CVE-2026-20277

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20277 are related to protection mechanism failure issues that are grouped under the Common Weakness Enumeration (CWE) CWE-693.

Scoring

Severity
HIGH
CVSS base score
8.2
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
EPSS probability
0.22%
CWE
CWE-693
Published
2026-09-02
Last modified
2026-09-09

Affected products

Weakness type

Related vulnerabilities

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