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[Update] Vulnerability in Cisco Catalyst SD-WAN (February 25, 2026)

unknownknown exploitedpublic exploitCVE-2026-20127
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
A vulnerability has been discovered in Cisco Catalyst SD-WAN. It allows an attacker to bypass security policy. Cisco states that the vulnerability CVE-2026-20127 is actively being exploited.

CSIRTS triage

What
A vulnerability allows an attacker to bypass security policy.
Who is affected
Users of Cisco Catalyst SD-WAN.
Urgency
Remediation is critical as the vulnerability is actively being exploited.
Action
Implement recommended security measures and apply updates.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-FR Alertes de sécurité (FR · national-cert · site)
Severity
unknown
Published
2026-02-25
Exploitation
Observed in the wild (CISA KEV)
Language
Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/alerte/CERTFR-2026-ALE-002/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-20127coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Cisco Catalyst SD-WAN

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-FR Alertes de sécurité