CriticalCVE-2026-20316

    Cisco Secure Firewall Management Center Software Static Credential Vulnerability (CVE-2026-20316)

    Published Last modified In CISA KEV since Sources: BSI, CVE.org, pwn.watch, Cisco PSIRT, SingCERT

    What is affected, what to do

    A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems. This vulnerability is due to the presence of static user credentials for a low-privileged account.

    The vulnerability is being actively exploited; treat it as a priority. CISA lists it as used in ransomware campaigns. The available sources name no fixed version. Check the vendor guidance in the references below. Immediate actions, mitigation and detection rules are in the runbook below.

    Affected
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.0..7.0.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.0.1..7.0.0.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.1..7.0.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.1.1..7.0.1.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.2..7.0.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.0..7.2.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.2.1..7.0.2.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.3..7.0.3
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.0.1..7.2.0.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.4..7.0.4
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.1..7.2.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.5..7.0.5
    • Cisco Secure Firewall Management Center (FMC) eq 7.3.0..7.3.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.2..7.2.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.3.1..7.3.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.3..7.2.3
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.3.1..7.2.3.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.4..7.2.4
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.6..7.0.6
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.4.1..7.2.4.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.5..7.2.5
    • Cisco Secure Firewall Management Center (FMC) eq 7.3.1.1..7.3.1.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.0..7.4.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.6.1..7.0.6.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.5.1..7.2.5.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.1..7.4.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.6..7.2.6
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.1.1..7.4.1.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.6.2..7.0.6.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.7..7.2.7
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.5.2..7.2.5.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.3.1.2..7.3.1.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.8..7.2.8
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.0..7.6.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.2..7.4.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.8.1..7.2.8.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.6.3..7.0.6.3
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.2.1..7.4.2.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.9..7.2.9
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.7..7.0.7
    • Cisco Secure Firewall Management Center (FMC) eq 7.7.0..7.7.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.2.2..7.4.2.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.10..7.2.10
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.1..7.6.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.2.3..7.4.2.3
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.8..7.0.8
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.2..7.6.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.7.10..7.7.10
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.10.1..7.2.10.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.8.1..7.0.8.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.2.1..7.6.2.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.10.2..7.2.10.2
    • Cisco Secure Firewall Management Center (FMC) eq 7.7.10.1..7.7.10.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.2.4..7.4.2.4
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.3..7.4.3
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.3..7.6.3
    • Cisco Secure Firewall Management Center (FMC) eq 7.7.11..7.7.11
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.4..7.6.4
    • Cisco Secure Firewall Management Center (FMC) eq 10.0.0..10.0.0
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.4..7.4.4
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.5..7.4.5
    • Cisco Secure Firewall Management Center (FMC) eq 7.0.9..7.0.9
    • Cisco Secure Firewall Management Center (FMC) eq 7.2.11..7.2.11
    • Cisco Secure Firewall Management Center (FMC) eq 7.7.12..7.7.12
    • Cisco Secure Firewall Management Center (FMC) eq 7.6.5..7.6.5
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.6..7.4.6
    • Cisco Secure Firewall Management Center (FMC) eq 10.0.1..10.0.1
    • Cisco Secure Firewall Management Center (FMC) eq 7.4.7..7.4.7

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    5.3

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    5.3

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: BSI, CVE.org, pwn.watch, Cisco PSIRT, SingCERT

    35.1 %

    EPSS score

    Elevated — model estimates 10-50% exploitation likelihood.

    Source: FIRST EPSS, percentile 98.4

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    250.99 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    actively exploitedSource: VulnCheck KEV (opens in a new tab), CSA/SingCERT How we classify
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    5.3 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    5.3
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    35.1 %
    Elevated — model estimates 10-50% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    98.4
    Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    Actively exploited
    Published
    In CISA KEV since

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-259

    Response and mitigation

    Why act now?

    Prioritisation rationale

    This flaw is exploitable over the network without authentication and with trivial complexity, since a static password is all an attacker needs. The modest formal rating is misleading. The FMC is the control plane for your firewall estate and holds topology, rule sets and integration credentials, and the flaw is a foothold for chained privilege escalation. CISA flags known use in ransomware campaigns, and exploitation likelihood is among the highest of any CVE. Treat internet-reachable FMCs as critical, patching or isolating them within hours; strictly segmented deployments are high priority for the next emergency window. Under NIS2/KRITIS, assess reporting obligations if you find indicators of prior access.

    1. Runbook step 1

      Immediate response (0-24 h)

      • Check and cut exposure now: Determine whether the FMC web UI (HTTPS, TCP/443 by default) or its REST API is reachable from the internet or from untrusted segments. Block that access immediately at the perimeter or via ACL, and allow only a dedicated management network or jump host.
      • Inventory affected instances: Every FMC deployment (hardware, virtual or cloud) running 7.0.0–7.0.9, 7.2.0–7.2.11, 7.3.0–7.3.1.2, 7.4.0–7.4.7, 7.6.0–7.6.5, 7.7.0–7.7.12 or 10.0.0–10.0.1 is vulnerable.
      • Apply the vendor fix: A patch is available from the vendor; look up the fixed release in the Cisco Security Advisory for CVE-2026-20316 and schedule it as an emergency change. Validate upgrade paths, especially major-release jumps, with the Cisco Software Checker first.
      • Preserve evidence before patching: Export and retain the FMC audit logs and user login history before the upgrade, in case access has already occurred.
      • Rotate secrets: An attacker with read access can harvest sensitive data. Rotate everything stored on the FMC: admin and REST API accounts, LDAP/RADIUS bind accounts, VPN pre-shared keys, SNMP communities and integration tokens (ISE, SecureX/XDR).
      • Assess chaining risk: Cisco rates this issue above its base score because it can be chained with other FMC flaws for privilege escalation. Confirm in parallel that all other outstanding FMC advisories are remediated.

    2. Runbook step 2

      Mitigation layers

      • Network segmentation: Keep the FMC in an isolated out-of-band management VLAN. Allow TCP/443 and TCP/22 only from defined admin sources (jump host, PAW). Restrict FMC-to-FTD sftunnel (TCP/8305) to known device IPs.
      • On-box access list: Under System > Configuration > Access List, restrict HTTPS and SSH source addresses to the management network. This adds a layer on top of the perimeter firewall.
      • Front-door controls: If remote access is unavoidable, route it through MFA-protected VPN or an authenticating reverse proxy. Never expose the FMC UI directly to the internet.
      • IPS/network rule: Alert on any connection to the FMC management IP from outside the admin allowlist. Example Suricata idea: alert tcp !$ADMIN_NET any -> $FMC_MGMT 443 (msg:"FMC mgmt access from non-admin net"; flags:S; sid:9000001;).
      • IAM/least privilege: Review local FMC users for undocumented low-privileged accounts. Prefer external authentication (LDAP/RADIUS with MFA) and keep local accounts to a break-glass minimum.
      • Data minimisation: Until patched, avoid cleartext secrets in objects, policies or notes on the FMC. Check the integrity and permissions of FMC backup storage.

    3. Runbook step 3

      Detection rules

      • FMC audit log (syslog to SIEM): Look for successful logins by accounts not in your user inventory, or from source IPs outside the admin network. SPL: index=fmc sourcetype=cisco:fmc:audit action=login status=success NOT src_ip IN (<admin_net>) | stats count by user, src_ip.
      • REST API abuse: Watch for token requests to /api/fmc_platform/v1/auth/generatetoken or bulk GETs against /api/fmc_config/ from unknown sources or outside change windows. Both suggest automated config and object harvesting.
      • Network telemetry (Zeek/NetFlow): Flag inbound internet sessions to the FMC on TCP/443 or TCP/22, and unusually large outbound transfers from the FMC that could indicate a config export. KQL: CommonSecurityLog | where DestinationIP == "<fmc_ip>" and DestinationPort in (443,22) and not(ipv4_is_in_range(SourceIP,"<admin_cidr>")).
      • Privilege-escalation chain: Watch for a low-privileged login followed shortly by role changes, new admin users, policy deployments or access-policy edits. Build a Sigma correlation on user and time window (for example, 60 min).
      • Downstream activity: Watch for VPN, LDAP or network-device logins using credentials stored on the FMC, particularly after a suspicious FMC login. That pattern is a strong pre-ransomware staging indicator.

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Actively exploited: treat the vulnerability as a priority in vulnerability handling under Art. 21(2)(e) NIS2. If it is exploited in your environment, check the reporting obligation under Art. 23 (early warning within 24 hours).
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    Since 11.09.2026, manufacturers of affected products with digital elements must report actively exploited vulnerabilities under Art. 14 CRA, with an early warning within 24 hours via ENISA's single reporting platform.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems. This vulnerability is due to the presence of static user credentials for a low-privileged&nbsp;account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.&nbsp; Note:&nbsp;If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.&nbsp;&nbsp; Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges.

    Source: BSI CSAF, BSI WID Portal, NVD (NIST), pwn.watch, cvelistv5, CISA KEV Catalog, cisco_csaf, CSA/SingCERT

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    CiscoCisco Secure Firewall Management Center (FMC)
    • 7.4.1.1
    • 7.2.11
    • 7.2.10.2
    • 7.4.2.4
    • 7.4.7
    • 7.4.2.3
    • 7.2.2
    • 7.6.0
    • 7.3.0
    • 7.4.2.1
    • 7.2.5
    • 7.0.6
    • 7.4.0
    • 7.0.2
    • 7.0.5
    • 7.6.2
    • 7.0.6.1
    • 10.0.1
    • 7.4.5
    • 7.2.8.1
    • 7.3.1.1
    • 7.3.1
    • 7.0.6.2
    • 7.0.4
    • 7.6.4
    • 7.3.1.2
    • 7.2.7
    • 7.0.1.1
    • 7.6.1
    • 7.2.10.1
    • 7.2.4
    • 7.0.3
    • 7.2.1
    • 7.0.9
    • 7.6.3
    • 7.2.6
    • 7.2.8
    • 7.0.0.1
    • 7.0.0
    • 7.7.0
    • 7.2.3.1
    • 7.2.4.1
    • 7.2.3
    • 7.6.2.1
    • 7.7.11
    • 7.4.1
    • 10.0.0
    • 7.4.6
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    Vendors and products

    Weakness classes (CWE)

    • CWE-259Use of Hard-coded Password

      Variant

      The product contains a hard-coded password, which it uses for its own inbound authentication or for outbound communication to external components.

      Entry at MITRE CWE-259

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    CISA KEV CatalogCISA Known Exploited Vulnerability (opens in a new tab)cisa.govactively exploited
    CSA/SingCERTActive Exploitation of Vulnerability in Cisco Secure Firewall Management Center (opens in a new tab)CSA/SingCERTactively exploited

    References & sources

    • sec.cloudapps.cisco.comcisco-sa-fmc-static-cred-BET3Cjhpwn-watch, Vendor advisory
    • cisa.govknown-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20316government-resource, US government resource
    • pwn.watchpwn.watch: Cisco Secure Firewall Management Center (FMC): Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerabilitypwn-watch
    • NVD (NIST)NVD: CVE-2026-20316pwn-watch
    • cisa.govCISA Known Exploited Vulnerabilities Catalogpwn-watch

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedCisco

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/20xxx/CVE-2026-20316.json">CVE-2026-20316</a>
      Referenceadded
      —
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh
      Referenceremoved
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh
      —
      Reference typeremoved
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh Types: Vendor Advisory
      —

      Source identifier: psirt@cisco.com

    2. Record modifiedCISA ADP

      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20316
      Referenceremoved
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20316
      —
      Reference typeremoved
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20316 Types: US Government Resource
      —

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: active, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentchanged
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-07-30T03:55:25.997164Z"}
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-07-31T17:15:02.964102Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    4. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: active, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentchanged
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-07-29T00:00:00+00:00"}
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-07-30T03:55:25.997164Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    5. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: active, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentchanged
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-07-29T19:08:35.311158Z"}
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-07-29T00:00:00+00:00"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Show 2 older changes

    1. ReceivedCisco

      CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

      Weakness type: CWE-259

      Description added or changed

      Show 5 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Cisco Secure Firewall Management Center (FMC)
      Descriptionadded
      —
      A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to log in to an affected device using a low-privileged account to access sensitive data within the impacted systems. This vulnerability is due to the presence of static user credentials for a low-privileged&nbsp;account. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and access sensitive data as the low-privileged user.&nbsp; Note:&nbsp;If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.&nbsp;&nbsp; Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that this vulnerability can be used with other Cisco Secure FMC Software vulnerabilities to elevate privileges.
      CVSSadded
      —
      AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
      Weakness type (CWE)added
      —
      CWE-259
      Referenceadded
      —
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-static-cred-BET3Cjh

      Source identifier: psirt@cisco.com

    2. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-20316","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-07-29T16:42:10.550297Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

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    Badge preview for CVE-2026-20316
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-20316"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-20316.svg?lang=en" alt="CVE-2026-20316 – NEOSEC Intel" height="20"></a>