Riskcovery

CVE-2026-20311

Cisco IOS XE Software Web UI Denial of Service Vulnerability

State
Published
Severity
6.3 Medium
Published
Aug 5, 2026
Updated
Aug 5, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

Description

A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to insufficient error handling in the web-based management interface. An attacker could exploit this vulnerability by authenticating with a malformed certificate. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Scores

CVSSScoreVectorSource
3.16.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:Hcisco

Weaknesses

Affected Products

ProductVersions
Cisco IOS XE SoftwareCisco
  • 17.3.1Affected
  • 17.3.1aAffected
  • 17.3.2aAffected
  • 17.3.1wAffected
  • 17.3.2Affected
  • 17.4.1Affected
  • 17.4.1aAffected
  • 17.3.1xAffected
  • 17.3.3Affected
  • 17.5.1Affected
  • 17.4.1bAffected
  • 17.3.1zAffected
  • 17.4.2Affected
  • 17.3.3aAffected
  • 17.3.5Affected
  • 17.3.4Affected
  • 17.5.1aAffected
  • 17.6.1Affected
  • 17.3.4aAffected
  • 17.6.1aAffected
  • 17.7.1Affected
  • 17.6.1xAffected
  • 17.6.2Affected
  • 17.3.4cAffected
  • 17.4.2aAffected
  • and 127 more versions

References

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