CriticalCVE-2026-20133

    Cisco Catalyst SD-WAN Manager: Exposure of Sensitive Information to an Unauthorized Actor (CVE-2026-20133)

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

    What is affected, what to do

    A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions.

    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 17.2.6..17.2.6
    • Cisco Catalyst SD-WAN Manager eq 17.2.7..17.2.7
    • Cisco Catalyst SD-WAN Manager eq 17.2.8..17.2.8
    • Cisco Catalyst SD-WAN Manager eq 17.2.9..17.2.9
    • Cisco Catalyst SD-WAN Manager eq 17.2.10..17.2.10
    • Cisco Catalyst SD-WAN Manager eq 17.2.4..17.2.4
    • 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 18.3.3.1..18.3.3.1
    • Cisco Catalyst SD-WAN Manager eq 18.3.3..18.3.3
    • Cisco Catalyst SD-WAN Manager eq 18.3.4..18.3.4
    • Cisco Catalyst SD-WAN Manager eq 18.3.5..18.3.5
    • Cisco Catalyst SD-WAN Manager eq 18.3.7..18.3.7
    • Cisco Catalyst SD-WAN Manager eq 18.3.8..18.3.8
    • Cisco Catalyst SD-WAN Manager eq 18.3.6.1..18.3.6.1
    • Cisco Catalyst SD-WAN Manager eq 18.3.1..18.3.1
    • Cisco Catalyst SD-WAN Manager eq 18.3.0..18.3.0
    • Cisco Catalyst SD-WAN Manager eq 18.4.0.1..18.4.0.1
    • Cisco Catalyst SD-WAN Manager eq 18.4.3..18.4.3
    • 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 18.4.4..18.4.4
    • Cisco Catalyst SD-WAN Manager eq 18.4.5..18.4.5
    • Cisco Catalyst SD-WAN Manager eq 18.4.0..18.4.0
    • Cisco Catalyst SD-WAN Manager eq 18.4.1..18.4.1
    • Cisco Catalyst SD-WAN Manager eq 18.4.6..18.4.6
    • Cisco Catalyst SD-WAN Manager eq 19.2.0..19.2.0
    • Cisco Catalyst SD-WAN Manager eq 19.2.097..19.2.097
    • Cisco Catalyst SD-WAN Manager eq 19.2.099..19.2.099
    • Cisco Catalyst SD-WAN Manager eq 19.2.1..19.2.1
    • Cisco Catalyst SD-WAN Manager eq 19.2.2..19.2.2
    • Cisco Catalyst SD-WAN Manager eq 19.2.3..19.2.3
    • Cisco Catalyst SD-WAN Manager eq 19.2.31..19.2.31
    • Cisco Catalyst SD-WAN Manager eq 19.2.929..19.2.929
    • Cisco Catalyst SD-WAN Manager eq 19.2.4..19.2.4
    • Cisco Catalyst SD-WAN Manager eq 20.1.1.1..20.1.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.1.12..20.1.12
    • Cisco Catalyst SD-WAN Manager eq 20.1.1..20.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.1.2..20.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.1.3..20.1.3
    • Cisco Catalyst SD-WAN Manager eq 19.3.0..19.3.0
    • Cisco Catalyst SD-WAN Manager eq 19.1.0..19.1.0
    • Cisco Catalyst SD-WAN Manager eq 18.2.0..18.2.0
    • Cisco Catalyst SD-WAN Manager eq 20.3.1..20.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.2..20.3.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.2.1..20.3.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.3..20.3.3
    • Cisco Catalyst SD-WAN Manager eq 20.3.3.1..20.3.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4..20.3.4
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.1..20.3.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.2..20.3.4.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.5..20.3.5
    • 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 20.3.7.1..20.3.7.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.4.3..20.3.4.3
    • Cisco Catalyst SD-WAN Manager eq 20.3.5.1..20.3.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.3.7.2..20.3.7.2
    • Cisco Catalyst SD-WAN Manager eq 20.3.8..20.3.8
    • Cisco Catalyst SD-WAN Manager eq 20.4.1..20.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.1..20.4.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.1.2..20.4.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.4.2..20.4.2
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.2..20.4.2.2
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.1..20.4.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.4.2.3..20.4.2.3
    • Cisco Catalyst SD-WAN Manager eq 20.5.1..20.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.5.1.2..20.5.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.5.1.1..20.5.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.1..20.6.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.1.1..20.6.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.1..20.6.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.2.2..20.6.2.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.2..20.6.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.3..20.6.3
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.1..20.6.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.4..20.6.4
    • Cisco Catalyst SD-WAN Manager eq 20.6.5..20.6.5
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1..20.6.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.3..20.6.5.3
    • Cisco Catalyst SD-WAN Manager eq 20.6.1.2..20.6.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.2..20.6.3.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.4.1..20.6.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.2..20.6.5.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.4..20.6.5.4
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.3..20.6.3.3
    • Cisco Catalyst SD-WAN Manager eq 20.6.4.2..20.6.4.2
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.0.45..20.6.3.0.45
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.0.46..20.6.3.0.46
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.0.47..20.6.3.0.47
    • Cisco Catalyst SD-WAN Manager eq 20.6.3.4..20.6.3.4
    • Cisco Catalyst SD-WAN Manager eq 20.6.4.0.21..20.6.4.0.21
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1.10..20.6.5.1.10
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1.11..20.6.5.1.11
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1.7..20.6.5.1.7
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1.9..20.6.5.1.9
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.2.4..20.6.5.2.4
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.5..20.6.5.5
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.2.8..20.6.5.2.8
    • Cisco Catalyst SD-WAN Manager eq 20.6.5.1.13..20.6.5.1.13
    • Cisco Catalyst SD-WAN Manager eq 20.6.6..20.6.6
    • Cisco Catalyst SD-WAN Manager eq 20.6.7..20.6.7
    • Cisco Catalyst SD-WAN Manager eq 20.6.8..20.6.8
    • Cisco Catalyst SD-WAN Manager eq 20.7.1..20.7.1
    • Cisco Catalyst SD-WAN Manager eq 20.7.1.1..20.7.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.7.2..20.7.2
    • Cisco Catalyst SD-WAN Manager eq 20.8.1..20.8.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.1..20.9.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.2..20.9.2
    • Cisco Catalyst SD-WAN Manager eq 20.9.2.1..20.9.2.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.3..20.9.3
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.1..20.9.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.2.3..20.9.2.3
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.12..20.9.3.0.12
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.16..20.9.3.0.16
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.17..20.9.3.0.17
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.18..20.9.3.0.18
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.20..20.9.3.0.20
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.21..20.9.3.0.21
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.2..20.9.3.2
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.2_LI_Images..20.9.3.2_LI_Images
    • Cisco Catalyst SD-WAN Manager eq 20.9.4..20.9.4
    • Cisco Catalyst SD-WAN Manager eq 20.9.4_LI_Images..20.9.4_LI_Images
    • Cisco Catalyst SD-WAN Manager eq 20.9.3.0.23..20.9.3.0.23
    • Cisco Catalyst SD-WAN Manager eq 20.9.4.1..20.9.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.5..20.9.5
    • Cisco Catalyst SD-WAN Manager eq 20.9.5.1..20.9.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.5.2..20.9.5.2
    • Cisco Catalyst SD-WAN Manager eq 20.9.6..20.9.6
    • Cisco Catalyst SD-WAN Manager eq 20.9.5.3..20.9.5.3
    • Cisco Catalyst SD-WAN Manager eq 20.9.7..20.9.7
    • Cisco Catalyst SD-WAN Manager eq 20.9.7.1..20.9.7.1
    • Cisco Catalyst SD-WAN Manager eq 20.9.8..20.9.8
    • Cisco Catalyst SD-WAN Manager eq 20.10.1..20.10.1
    • Cisco Catalyst SD-WAN Manager eq 20.10.1.1..20.10.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.10.1.2..20.10.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.11.1..20.11.1
    • Cisco Catalyst SD-WAN Manager eq 20.11.1.1..20.11.1.1
    • Cisco Catalyst SD-WAN Manager eq 20.11.1.2..20.11.1.2
    • Cisco Catalyst SD-WAN Manager eq 20.12.1..20.12.1
    • Cisco Catalyst SD-WAN Manager eq 20.12.1_LI_Images..20.12.1_LI_Images
    • Cisco Catalyst SD-WAN Manager eq 20.12.2..20.12.2
    • Cisco Catalyst SD-WAN Manager eq 20.12.3..20.12.3
    • Cisco Catalyst SD-WAN Manager eq 20.12.3.1..20.12.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.12.4..20.12.4
    • Cisco Catalyst SD-WAN Manager eq 20.12.4.1..20.12.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.12.5..20.12.5
    • Cisco Catalyst SD-WAN Manager eq 20.12.5.1..20.12.5.1
    • Cisco Catalyst SD-WAN Manager eq 20.12.5.2..20.12.5.2
    • Cisco Catalyst SD-WAN Manager eq 20.12.6..20.12.6
    • Cisco Catalyst SD-WAN Manager eq 20.13.1..20.13.1
    • Cisco Catalyst SD-WAN Manager eq 20.14.1..20.14.1
    • Cisco Catalyst SD-WAN Manager eq 20.15.1..20.15.1
    • Cisco Catalyst SD-WAN Manager eq 20.15.2..20.15.2
    • Cisco Catalyst SD-WAN Manager eq 20.15.3..20.15.3
    • Cisco Catalyst SD-WAN Manager eq 20.15.3.1..20.15.3.1
    • Cisco Catalyst SD-WAN Manager eq 20.15.4..20.15.4
    • Cisco Catalyst SD-WAN Manager eq 20.15.4.1..20.15.4.1
    • Cisco Catalyst SD-WAN Manager eq 20.16.1..20.16.1
    • Cisco Catalyst SD-WAN Manager eq 20.18.1..20.18.1
    • Cisco Catalyst SD-WAN Manager eq 20.18.2..20.18.2

    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

    6.5

    CVSS v3

    Severity Medium on the scale from 0 to 10.

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

    31.5 %

    EPSS score

    Elevated — model estimates 10-50% exploitation likelihood.

    Source: FIRST EPSS, percentile 98.3

    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
    224.45 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
    6.5
    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
    31.5 %
    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
    98.3
    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-200

    Response and mitigation

    Why act now?

    Prioritisation rationale

    This flaw sits in the control plane of the entire SD-WAN fabric. Secrets read from the Manager — certificates, AAA secrets, API tokens — are a natural stepping stone to taking over controllers and edge routers, and with them the WAN traffic of every site. The source data is contradictory: the CVSS vector describes network-reachable exploitation without authentication or user interaction, while the description requires netadmin privileges and vshell access. Defenders should plan for the worse case, especially as exploitation likelihood is very high and the CVE ranks among those most likely to be exploited. For KRITIS and NIS2 organisations whose Manager is internet-facing or broadly reachable internally, treat this as critical and patch within 24–72 h. Where management access is tightly segmented and only a few MFA-protected netadmin accounts exist, "high" is defensible, but secret rotation is still strongly recommended.

    1. Runbook step 1

      Immediate response (0-24 h)

      • Build the inventory: List every Cisco Catalyst SD-WAN Manager (vManage) instance, including cluster nodes and DR instances. Check versions via show version or the GUI (Administration → About) against the affected releases: 17.2.4 through 17.2.10 and 18.3.1.1.
      • Patch: A patch is available from the vendor — look up the fixed release in the Cisco Security Advisory for CVE-2026-20133. Raise an emergency change and confirm vSmart/vBond/Edge compatibility using Cisco's compatibility matrix before upgrading.
      • Cut exposure now: Confirm whether management interfaces (HTTPS GUI/API on 443, SSH on 22, NETCONF on 830) are reachable from the internet or from broad corporate ranges. Restrict access via perimeter firewall or ACL to a dedicated admin jump-host group.
      • Review privileged accounts: Enumerate all accounts holding the netadmin role (local, TACACS+/RADIUS, SSO). Disable unneeded accounts and reset credentials on the remaining netadmin and admin accounts.
      • Assume compromise if exposed: If the instance was exposed, or unauthorised netadmin access cannot be ruled out, treat every secret stored on the box as disclosed. This covers API tokens, TACACS+/RADIUS shared secrets, SNMP communities, certificates and private keys, and cloud or integration credentials. Rotate all of them.
      • Preserve evidence before upgrading: Export audit logs, syslog and admin-tech bundles so forensic analysis remains possible after the upgrade.

    2. Runbook step 2

      Mitigation layers

      • Network segmentation: Run SD-WAN Manager only inside a dedicated management VLAN or VRF. Allow inbound 22/443/830 solely from PAW or jump-host addresses and default-deny everything else. Restrict the Manager's egress to required destinations (controllers, NTP, syslog, AAA, Cisco cloud) to hamper exfiltration.
      • IAM/least privilege: Shrink netadmin membership to the bare minimum and use custom lower-privilege roles for routine operations. Enforce MFA through upstream AAA/SSO and vault local break-glass accounts in a PAM tool with check-out and session recording.
      • Configuration hardening: Prohibit vshell use by policy and, where the platform allows it, restrict it through role configuration or TACACS+ command authorisation. Log every vshell invocation via AAA accounting.
      • IPS/WAF: Front the HTTPS GUI/API with an IPS signature set or reverse proxy that allow-lists source IPs and alerts on anomalies (unusual API paths, high request rates). Watch Cisco Talos/Snort for signature updates covering CVE-2026-20133.
      • Secret hygiene: Replace long-lived keys and tokens with short-lived ones and document rotation cycles (ISO 27001 A.8.24/A.5.17) to limit the blast radius of any disclosure.

    3. Runbook step 3

      Detection rules

      • AAA/TACACS+ accounting: Alert on any execution of the vshell command, especially outside change windows. SPL example: index=network sourcetype=tacacs cmd="vshell*" | stats count by user, src_ip, host
      • Shell activity after vshell: Hunt the Manager's syslog or audit log for reads of sensitive paths, such as cat, less, cp, tar or scp against config, certificate and key directories, /etc/shadow, or database and backup files. A Sigma rule shape: logsource: product=cisco_sdwan; detection: CommandLine|contains: ['/etc/shadow','.key','.pem','private'] AND user.role: netadmin.
      • Anomalous logins: Flag SSH or GUI logins by netadmin accounts from outside the jump-host group, from new geolocations or at unusual hours. Also flag bursts of failures followed by a success. KQL example: Syslog | where ProcessName has "sshd" and SyslogMessage has "Accepted" and not(SrcIP in (JumpHosts))
      • Network telemetry (Zeek/Suricata): Look for large outbound transfers from the Manager (conn.log with high orig_bytes to unknown destinations) and SCP/SFTP sessions initiated by the Manager itself.
      • Downstream abuse: Monitor for use of harvested secrets elsewhere, such as AAA logins with service accounts from foreign networks, API calls with known tokens from new IPs, or unexpected template and policy changes in the SD-WAN audit log.

    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 Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions. An authenticated attacker with netadmin privileges could exploit this vulnerability by accessing the vshell of an affected system. A successful exploit could allow the attacker to read sensitive information on the underlying operating system.

    Source: certeu_advisory, pwn.watch, NVD (NIST), cvelistv5, CISA KEV Catalog, cisco_csaf, 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
    • 20.6.7
    • 20.6.5.1
    • 20.3.8
    • 20.3.4.1
    • 20.15.1
    • 18.4.0
    • 20.6.3.0.46
    • 20.3.6
    • 20.3.3
    • 20.6.5
    • 20.4.1.2
    • 20.9.5.3
    • 20.6.5.1.13
    • 20.12.5.2
    • 20.9.3.2_LI_Images
    • 20.6.5.1.10
    • 20.9.5
    • 18.3.6.1
    • 20.6.3.3
    • 20.6.5.4
    • 20.12.3
    • 20.9.7.1
    • 19.1.0
    • 20.1.1.1
    • 20.3.2.1
    • 20.12.1_LI_Images
    • 20.3.3.1
    • 20.3.4.3
    • 20.15.3.1
    • 20.6.3.0.45
    • 20.9.3
    • 20.15.3
    • 20.5.1.1
    • 19.2.099
    • 20.18.1
    • 20.9.6
    • 20.10.1
    • 20.6.4
    • 20.4.1.1
    • 20.12.3.1
    • 20.3.7.2
    • 20.6.2.1
    • 20.6.5.2
    • 18.3.3.1
    • 18.2.0
    • 17.2.7
    • 20.11.1.1
    • 20.7.1.1
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    Vendors and products

    Weakness classes (CWE)

    • CWE-200Exposure of Sensitive Information to an Unauthorized Actor

      Class

      The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

      Entry at MITRE CWE-200

    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-2026-20133government-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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    Badge preview for CVE-2026-20133
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-20133"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-20133.svg?lang=en" alt="CVE-2026-20133 – NEOSEC Intel" height="20"></a>