CVE-2026-20311CWE-126

CVE-2026-20311

Medium · published August 5, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
15.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00252 · 15.8th percentile
Weakness
CWE-126 · Buffer Over-read
Published
2026-08-05T21:16Z
References (1)
EPSS history
Timeline
  • 05 AUG 16:32Z
    Cisco IOS XE Software Web UI Denial of Service Vulnerability
    cvelistv5