Riskcovery

CVE-2026-20272

Cisco IOS XE Software Security Hardening Release

State
Published
Severity
9.8 Critical
Published
Aug 5, 2026
Updated
Oct 2, 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 XE Software 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-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hcisco

Weaknesses

  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Affected Products

ProductVersions
Cisco IOS XE SoftwareCisco
  • 17.2.1aAffected
  • 16.12.1yAffected
  • 16.12.3sAffected
  • 16.7.1bAffected
  • 16.6.2Affected
  • 16.6.5Affected
  • 16.12.1wAffected
  • 16.9.1dAffected
  • 17.3.1Affected
  • 16.9.4cAffected
  • 16.7.1Affected
  • 17.2.1Affected
  • 16.6.8Affected
  • 16.9.1bAffected
  • 16.9.2sAffected
  • 16.12.4Affected
  • 16.12.3aAffected
  • 17.1.1sAffected
  • 16.11.1aAffected
  • 16.7.2Affected
  • 16.11.1bAffected
  • 16.9.1sAffected
  • 16.9.3hAffected
  • 16.9.1cAffected
  • 16.6.5aAffected
  • and 246 more versions

References

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