CVE-2026-20311
Cisco IOS XE Software Web UI Denial of Service Vulnerability
Severity
Medium 6.3
CVSS 3.1
Exploited
Not listed
EPSS
—
Discovered by
Vendor
Published by the vendor
Published
Aug 5, 2026
Assigned by cisco
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.
Weakness: CWE-126
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco IOS XE Software | Routing & Switching | cna-assigner |
Vendor-reported affected versions (1)
- Cisco · Cisco IOS XE Software