CriticalCVE-2026-20128

    Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability (CVE-2026-20128)

    Published In CISA KEV since Sources: CERT-EU, pwn.watch, Cisco PSIRT, CVE.org

    What is affected, what to do

    A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system. This vulnerability is due to the presence of a credential file for the DCA user on an affected system.

    The vulnerability is being actively exploited; treat it as a priority. Update catalyst_sd-wan_manager to version 20.15.4.2. Immediate actions, mitigation and detection rules are in the runbook below.

    Affected
    • Cisco Catalyst SD-WAN Manager eq 20.1.12..20.1.12
    • Cisco Catalyst SD-WAN Manager eq 19.2.1..19.2.1
    • Cisco Catalyst SD-WAN Manager eq 18.4.4..18.4.4
    • Cisco Catalyst SD-WAN Manager eq 18.4.5..18.4.5
    • Cisco Catalyst SD-WAN Manager eq 20.1.1.1..20.1.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.1.1..20.1.1
    • Cisco Catalyst SD-WAN Manager eq 19.3.0..19.3.0
    • Cisco Catalyst SD-WAN Manager eq 19.2.2..19.2.2
    • Cisco Catalyst SD-WAN Manager eq 19.2.099..19.2.099
    • Cisco Catalyst SD-WAN Manager eq 18.3.6..18.3.6
    • Cisco Catalyst SD-WAN Manager eq 18.3.7..18.3.7
    • Cisco Catalyst SD-WAN Manager eq 19.2.0..19.2.0
    • Cisco Catalyst SD-WAN Manager eq 18.3.8..18.3.8
    • Cisco Catalyst SD-WAN Manager eq 19.0.0..19.0.0
    • Cisco Catalyst SD-WAN Manager eq 19.1.0..19.1.0
    • Cisco Catalyst SD-WAN Manager eq 18.4.302..18.4.302
    • Cisco Catalyst SD-WAN Manager eq 18.4.303..18.4.303
    • Cisco Catalyst SD-WAN Manager eq 19.2.097..19.2.097
    • Cisco Catalyst SD-WAN Manager eq 19.2.098..19.2.098
    • Cisco Catalyst SD-WAN Manager eq 17.2.10..17.2.10
    • Cisco Catalyst SD-WAN Manager eq 18.3.6.1..18.3.6.1
    • Cisco Catalyst SD-WAN Manager eq 19.0.1a..19.0.1a
    • Cisco Catalyst SD-WAN Manager eq 18.2.0..18.2.0
    • Cisco Catalyst SD-WAN Manager eq 18.4.3..18.4.3
    • Cisco Catalyst SD-WAN Manager eq 18.4.1..18.4.1
    • Cisco Catalyst SD-WAN Manager eq 17.2.8..17.2.8
    • Cisco Catalyst SD-WAN Manager eq 18.3.3.1..18.3.3.1
    • Cisco Catalyst SD-WAN Manager eq 18.4.0..18.4.0
    • Cisco Catalyst SD-WAN Manager eq 18.3.1..18.3.1
    • Cisco Catalyst SD-WAN Manager eq 17.2.6..17.2.6
    • Cisco Catalyst SD-WAN Manager eq 17.2.9..17.2.9
    • Cisco Catalyst SD-WAN Manager eq 18.3.4..18.3.4
    • Cisco Catalyst SD-WAN Manager eq 17.2.5..17.2.5
    • Cisco Catalyst SD-WAN Manager eq 18.3.1.1..18.3.1.1
    • Cisco Catalyst SD-WAN Manager eq 18.3.5..18.3.5
    • Cisco Catalyst SD-WAN Manager eq 18.4.0.1..18.4.0.1
    • Cisco Catalyst SD-WAN Manager eq 18.3.3..18.3.3
    • Cisco Catalyst SD-WAN Manager eq 17.2.7..17.2.7
    • Cisco Catalyst SD-WAN Manager eq 18.3.0..18.3.0
    • Cisco Catalyst SD-WAN Manager eq 19.2.3..19.2.3
    • Cisco Catalyst SD-WAN Manager eq 18.4.501_ES..18.4.501_ES
    • Cisco Catalyst SD-WAN Manager eq 20.3.1..20.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.1.2..20.1.2
    • Cisco Catalyst SD-WAN Manager eq 19.2.929..19.2.929
    • Cisco Catalyst SD-WAN Manager eq 19.2.31..19.2.31
    • Cisco Catalyst SD-WAN Manager eq 20.3.2..20.3.2
    • Cisco Catalyst SD-WAN Manager eq 19.2.32..19.2.32
    • Cisco Catalyst SD-WAN Manager eq 20.3.2.1..20.3.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.2.1_927..20.3.2.1_927
    • Cisco Catalyst SD-WAN Manager eq 18.4.6..18.4.6
    • Cisco Catalyst SD-WAN Manager eq 20.3.2_928..20.3.2_928
    • Cisco Catalyst SD-WAN Manager eq 20.3.2_929..20.3.2_929
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.0.1..20.4.1.0.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.2.1_930..20.3.2.1_930
    • Cisco Catalyst SD-WAN Manager eq 19.2.4..19.2.4
    • Cisco Catalyst SD-WAN Manager eq 20.5.0.1.1..20.5.0.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.1..20.4.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.3..20.3.3
    • Cisco Catalyst SD-WAN Manager eq 19.2.4.0.1..19.2.4.0.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.2_937..20.3.2_937
    • Cisco Catalyst SD-WAN Manager eq 20.5.1..20.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.1.3..20.1.3
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.0.4..20.3.3.0.4
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.1.2..20.3.3.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.1.1..20.3.3.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.2..20.4.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.0.2..20.3.3.0.2
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.1.5..20.4.1.1.5
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.0.02..20.4.1.0.02
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.1.7..20.3.3.1.7
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.1.5..20.3.3.1.5
    • Cisco Catalyst SD-WAN Manager eq 20.5.1.0.1..20.5.1.0.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.1.10..20.3.3.1.10
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.0.8..20.3.3.0.8
    • Cisco Catalyst SD-WAN Manager eq 20.4.2..20.4.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.4..20.3.4
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.0.14..20.3.3.0.14
    • Cisco Catalyst SD-WAN Manager eq 19.2.4.0.8..19.2.4.0.8
    • Cisco Catalyst SD-WAN Manager eq 19.2.4.0.9..19.2.4.0.9
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.1..20.3.4.0.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.2.0.5..20.3.2.0.5
    • Cisco Catalyst SD-WAN Manager eq 20.5.1.0.2..20.5.1.0.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.1.1..20.6.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.0.18.3..20.6.0.18.3
    • Cisco Catalyst SD-WAN Manager eq 20.3.2.0.6..20.3.2.0.6
    • Cisco Catalyst SD-WAN Manager eq 20.6.0.18.4..20.6.0.18.4
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.0.2..20.4.2.0.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.0.16..20.3.3.0.16
    • Cisco Catalyst SD-WAN Manager eq 20.6.1.0.1..20.6.1.0.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.6..20.3.4.0.6
    • Cisco Catalyst SD-WAN Manager eq 20.7.1EFT2..20.7.1EFT2
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.9..20.3.4.0.9
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.11..20.3.4.0.11
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.0.18..20.3.3.0.18
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.1..20.6.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.1..20.3.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.1..20.4.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.1.1..20.4.2.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.1.1..20.3.4.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.813..20.3.813
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.19..20.3.4.0.19
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.2.1..20.4.2.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.5.1.2..20.5.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.814..20.3.814
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.2..20.4.2.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.2..20.6.2.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.2.1..20.3.4.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.1.2..20.3.4.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.20..20.3.4.0.20
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.2.3..20.6.2.2.3
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.2.2..20.4.2.2.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.0.4..20.6.2.0.4
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.24..20.3.4.0.24
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.2.7..20.6.2.2.7
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.2.2..20.3.4.2.2
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.2.4..20.4.2.2.4
    • Cisco Catalyst SD-WAN Manager eq 20.3.5.0.8..20.3.5.0.8
    • Cisco Catalyst SD-WAN Manager eq 20.3.5.0.9..20.3.5.0.9
    • Cisco Catalyst SD-WAN Manager eq 20.3.5.0.7..20.3.5.0.7
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.0.2..20.6.3.0.2
    • Cisco Catalyst SD-WAN Manager eq 20.9.1EFT2..20.9.1EFT2
    • Cisco Catalyst SD-WAN Manager eq 20.3.6..20.3.6
    • Cisco Catalyst SD-WAN Manager eq 20.3.7..20.3.7
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.3..20.4.2.3
    • Cisco Catalyst SD-WAN Manager eq 20.3.5.1..20.3.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.3..20.3.4.3
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.2..20.3.3.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.7.1..20.3.7.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.0.25..20.3.4.0.25
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.2.4..20.6.2.2.4
    • Cisco Catalyst SD-WAN Manager eq 20.6.1.2..20.6.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.1.3.1..20.1.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1.4..20.6.5.1.4
    • Cisco Catalyst SD-WAN Manager eq 20.3.8..20.3.8
    • Cisco Catalyst SD-WAN Manager eq 20.12.501..20.12.501
    • Cisco Catalyst SD-WAN Manager eq 26.1.1..26.1.1

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

    Metrics

    7.5

    Priority

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

    Source: NVD, CVSS v3

    7.5

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: CERT-EU, pwn.watch, Cisco PSIRT, CVE.org

    7.3 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 94.4

    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
    223.39 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), CERT.at 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
    7.5 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
    7.5
    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
    7.3 %
    Moderate — model estimates 1-10% 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
    94.4
    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-257

    Response and mitigation

    Why act now?

    Prioritisation rationale

    This CVE is on KEV because the SD-WAN Manager is the control plane for the entire WAN overlay. A recoverable DCA password lets an attacker pivot to other Managers and from there tamper with or spy on branch connectivity. The CVSS vector rates the attack as local, high-complexity and high-privilege, but with scope change and full confidentiality, integrity and availability impact. NVD instead describes an unauthenticated remote HTTP vector, so plan for the worse case. Exploitation likelihood is notably elevated, and CISA does not flag ransomware use. Treat it as high priority if any Manager GUI is broadly reachable or still runs 18.x–20.1.x. Tightly segmented, current deployments can follow the normal patch cycle, but should still rotate the DCA credential now.

    1. Runbook step 1

      Immediate response (0-24 h)

      • Inventory: Enumerate every Cisco Catalyst SD-WAN Manager (vManage) instance, including cluster members and DR standbys. Confirm versions via show version or the GUI. Versions listed as affected include 18.4.4, 18.4.5, 19.2.1, 19.2.2, 19.3.0, 20.1.1, 20.1.1.1 and 20.1.12. Releases 20.18 and later are not affected.
      • Upgrade: Move to a fixed release; 20.18+ is stated as not vulnerable. For intermediate trains, a patch is available from the vendor — check the Cisco advisory for the exact fixed version. Many affected 18.x/19.x/20.1.x builds are end-of-support, so plan a major upgrade.
      • Lock down management access: Restrict the HTTPS GUI/API and SSH to dedicated admin networks or jump hosts immediately. Block access from the internet and user VLANs, because NVD describes a remote vector via crafted HTTP requests.
      • Assume the DCA credential is burned: Rotate the DCA user password on all Managers. If you don't use the Data Collection Agent, disable it. The credential grants access to other affected systems, so remediate all Managers together.
      • Review local accounts: Audit local and low-privileged shell accounts on the Managers and disable unknown or unused ones. CISA describes a local vector via a low-privileged user.
      • Preserve evidence: Collect logs and admin-tech bundles before upgrading so a compromise assessment remains possible.

    2. Runbook step 2

      Mitigation layers

      • Network segmentation: Place Managers in a dedicated management zone. Permit inbound HTTPS/SSH only from defined admin sources. Limit east-west flows between Managers across overlays or tenants to what operations require, which makes lateral reuse of the DCA credential harder.
      • WAF/IPS: Front the GUI/API with a reverse proxy or WAF. Block path-traversal patterns (../, %2e%2e, %252e) and unauthenticated access to file or download endpoints. Enable vendor/Talos IPS signatures for Cisco SD-WAN Manager.
      • IAM/least privilege: Route admin logins through RADIUS/TACACS+ with MFA and keep local accounts to break-glass only. Give the DCA user a unique password per instance, never shared across clusters or tenants.
      • Configuration: Disable the DCA feature where there is no TAC or telemetry need, and minimise vshell access.
      • Egress control: Restrict outbound connections from Managers to known destinations (Cisco cloud, controllers, edges). Alert on anything unexpected.

    3. Runbook step 3

      Detection rules

      • Manager/proxy access logs: Look for traversal or file-read patterns that returned HTTP 200 to non-admin sources. SPL example: index=sdwan sourcetype=access_combined (uri="*..*" OR uri="*%2e%2e*") status=200 | stats count by src_ip, uri
      • Authentication logs: Flag DCA user logins (GUI, API, SSH) from unknown IPs, outside TAC maintenance windows, or shortly after suspicious HTTP requests. Sigma shape: logsource: cisco_sdwan_manager | selection: user='dca' AND src_ip NOT IN admin_nets
      • Lateral movement: A DCA login on Manager B shortly after anomalous file access on Manager A indicates credential reuse. In Zeek, correlate ssh.log/conn.log for Manager-to-Manager or foreign-network connections to 22/443.
      • Local file reads: Where auditd or shell auditing is available, watch for low-privileged users reading DCA credential files. Auditd shape: -w <DCA credential path> -p r -k dca_cred. Obtain the path from the Cisco advisory or TAC.
      • Post-exploitation: After a DCA login, watch the Manager audit log for config changes such as new users, template edits, or policy pushes to edges.

    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 Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system. This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.

    Source: certeu_advisory, pwn.watch, cisco_csaf, NVD (NIST), cvelistv5, CISA KEV Catalog, CVE.org (MITRE)

    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 Catalyst SD-WAN Manager
    • 20.5.1.0.2
    • 20.3.8
    • 20.3.4.1
    • 18.4.0
    • 20.3.6
    • 20.3.4.0.11
    • 20.3.3.0.16
    • 20.3.3
    • 19.2.32
    • 20.3.4.1.2
    • 20.4.1.2
    • 20.3.5.0.8
    • 20.3.3.1.5
    • 19.0.0
    • 20.3.2_928
    • 20.4.2.2.2
    • 18.3.6.1
    • 20.3.4.1.1
    • 20.3.3.0.2
    • 19.1.0
    • 20.1.1.1
    • 20.3.2.1
    • 20.6.0.18.3
    • 20.4.2.2.4
    • 20.6.2.2.4
    • 20.3.4.3
    • 20.6.2.0.4
    • 20.3.3.2
    • 18.4.501_ES
    • 20.6.2.2.3
    • 19.2.099
    • 20.3.3.0.14
    • 20.4.1.1
    • 20.3.3.0.18
    • 20.3.4.0.19
    • 20.1.3.1
    • 20.6.2.1
    • 18.3.3.1
    • 18.2.0
    • 20.6.2.2.7
    • 17.2.7
    • 18.3.0
    • 19.2.0
    • 19.2.098
    • 20.1.1
    • 20.4.2.2
    • 20.3.813
    • 19.2.31
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    Vendors and products

    Weakness classes (CWE)

    • CWE-257Storing Passwords in a Recoverable Format

      Base

      The storage of passwords in a recoverable format makes them subject to password reuse attacks by malicious users. In fact, it should be noted that recoverable encrypted passwords provide no significant benefit over plaintext passwords since they are subject not only to reuse by malicious attackers but also by malicious insiders. If a system administrator can recover a password directly, or use a brute force search on the available information, the administrator can use the password on other accounts.

      Entry at MITRE CWE-257

    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

    References & sources

    • sec.cloudapps.cisco.comcisco-sa-sdwan-authbp-qwCX8D4vVendor advisory, pwn-watch
    • cisa.govknown-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20128government-resource, US government resource
    • cert.atCERT.at: Kritische Sicherheitslücken in Cisco Catalyst SD-WAN - aktiv ausgenutzt - Updates verfügbarcert-at
    • pwn.watchpwn.watch: Cisco Catalyst SD-WAN Manager: Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerabilitypwn-watch
    • NVD (NIST)NVD: CVE-2026-20133pwn-watch
    • NVD (NIST)NVD: CVE-2026-20128pwn-watch
    • cisa.govCISA Known Exploited Vulnerabilities Catalogpwn-watch

    Linked advisories

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