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Vulnerabilities CVE-2026-20311

CVE-2026-20311

Medium
Open
TLP:CLEAR

Cisco IOS XE Software Web UI Denial of Service Vulnerability

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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.

Details

CVSS Score
6.3
EPSS Score
0.16%

5.4th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
Confidence
90%
Published
Aug 5, 2026
Last Modified
Aug 5, 2026
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