Search threats, CVEs… ⌘K
Back to vendor advisories
Cisco Security Advisoriescisco-sa-webui-dos-qdc7qx3

Cisco IOS XE Software Web-Based Management Interface Denial of Service Vulnerability

A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the web-based management interface to become unresponsive. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webui-dos-qdc7qx3 Security Impact Rating: Medium CVE: CVE-2026-20308

Read the vendor bulletin
MediumCVSS not listedMedium severity
Scope

What the vendor says is affected

The collected bulletin did not provide a separate affected-products list. Check the original bulletin before making an exposure decision.

Next step

What the vendor recommends

Cisco has released software updates that address this vulnerability.

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Cisco

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-20308View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor