CVE-2026-20311

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.

Scoring

Severity
MEDIUM
CVSS base score
6.3
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS probability
0.16%
CWE
CWE-126
Published
2026-08-05
Last modified
2026-08-05

Affected products

Weakness type

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