Riskcovery

CVE-2026-20277

Cisco IOS XR Software Security Hardening Release: September 2026

State
Published
Severity
8.2 High
Published
Sep 2, 2026
Updated
Sep 18, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.18.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Hcisco

Weaknesses

  • CWE-693 Protection Mechanism Failure

Affected Products

ProductVersions
Cisco IOS XR SoftwareCisco
  • 6.5.29Affected
  • 7.0.1Affected
  • 6.5.26Affected
  • 6.5.25Affected
  • 6.5.28Affected
  • 6.5.90Affected
  • 7.1.1Affected
  • 7.0.90Affected
  • 6.7.1Affected
  • 7.0.2Affected
  • 7.1.15Affected
  • 7.2.1Affected
  • 7.1.2Affected
  • 6.7.2Affected
  • 7.0.11Affected
  • 7.0.12Affected
  • 7.0.14Affected
  • 7.1.25Affected
  • 7.2.12Affected
  • 7.3.1Affected
  • 7.1.3Affected
  • 6.7.3Affected
  • 7.4.1Affected
  • 7.2.2Affected
  • 6.7.4Affected
  • and 87 more versions

References

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