CVE-2026-20311

Cisco IOS XE Software Web UI Denial of Service Vulnerability

En bref

Sévérité: MEDIUM 6.3
EPSS: EPSS 0.25 % · centile 17 (2026-10-27)
État: PUBLISHED
Publiée: 2026-08-05
Mise à jour: 2026-08-05
Attribuée par: cisco
Statut NVD: Awaiting Analysis

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

Version	Score	Vecteur	Évalué par
CVSS 3.1	MEDIUM 6.3	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H	cisco
CVSS 3.1	MEDIUM 6.3	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H	NVD · psirt@cisco.com (Secondary)

Faiblesses (CWE)

CWE-126

Références européennes

ENISA EUVD · EUVD-2026-53475
GCVE · GCVE-0-2026-20311

Produits affectés

Produit	Versions
Cisco · Cisco IOS XE Software	affected 17.3.1 ; affected 17.3.1a ; affected 17.3.2a ; affected 17.3.1w ; affected 17.3.2 ; affected 17.4.1

Références

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xe-webui-dos-PtAODAWW

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD