CVE-2026-20127
Actively exploited. CVE-2026-20127 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-02-25) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-20127 is indexed in Metasploit and GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
On 25 February 2026, Cisco released security advisories addressing multiple high and critical severity vulnerabilities in Cisco Catalyst SD-WAN controllers and Cisco SD-WAN Manager. If exploited, these vulnerabilities could allow attackers to gain administrative access to compromised systems. It is recommended to capture forensic evidence, hunt for indicators of compromise, and apply updates as soon as possible. One of the vulnerabilities, CVE-2026-20127, is exploited in the wild since 2023.
CSIRTS triage
- What
- Multiple high and critical severity vulnerabilities could allow attackers to gain administrative access.
- Who is affected
- Deployments of Cisco Catalyst SD-WAN controllers and Cisco SD-WAN Manager.
- Urgency
- Immediate action is required as one vulnerability is actively exploited in the wild.
- Action
- Capture forensic evidence and apply updates as soon as possible.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-20127 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (5)
- criticalexploitedCisco Catalyst SD-WAN Controller Authentication Bypass Vulnerabilitycisco-psirt · 2026-06-16
- unknownexploitedCisco Catalyst SD-WAN Controller, Catalyst SD-WAN Manager, and Catalyst SD-WAN Validator Authenticated Privile…cisco-psirt · 2026-06-12
- criticalexploited2026-002: Multiple Vulnerabilities in Cisco Productscert-eu · 2026-02-26
- unknownexploited[Update] Vulnerability in Cisco Catalyst SD-WAN (February 25, 2026)cert-fr-alerte · 2026-02-25
- criticalexploitedCVE-2026-20127: Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerabilitycisa-kev · 2026-02-25
External references
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