CVE.RADIO
FREN

CVE-2026-20310

Cisco Catalyst SD-WAN ControllerVulnerabilityCVSS 9.1

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20310 are related to improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-59.

No public exploitation has been reported so far. No distribution fix is listed yet; apply vendor mitigations and monitor.

Recommended action: Track your distribution's security tracker and apply the fix as soon as it ships.

CVE-2026-20310 Cisco Catalyst SD-WAN Controller Vulnerability

Severity metrics

CVSS 3.1 : 9.1 CRITICAL

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh

Vector: AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected & fixed versions by distribution

Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.

No affected package in the tracked watchlist yet (Debian, Ubuntu, Arch, SUSE, Red Hat...). Triage may still be pending.

Sources

Advisory NVD CVE.org

Other vulnerabilities in Cisco Catalyst SD-WAN Controller

Published 2026-08-05 · source: NVD