VYPR
Unrated severityNVD Advisory· Published Aug 5, 2026· Updated Aug 5, 2026

Cisco IOS XE Software Web UI Denial of Service Vulnerability

CVE-2026-20311

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.

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Affected products

1

Patches

Vulnerability mechanics

References

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