CVE-2026-20308: Cisco IOS XE Software Web-Based Management Interface Vulnerability

Published Aug 5, 2026

Updated

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.

Affected Software

1 affected component

Cisco IOS XE Software Web-Based Management Interface

Event History

Aug 5, 2026

CVE Published

via MITRE·04:19 PM

Data Sourced

via MITRE·04:19 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·05:16 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-20308?

CVE-2026-20308 has a medium severity rating of 4.3.

What type of attack can exploit CVE-2026-20308?

CVE-2026-20308 can be exploited to perform a denial of service (DoS) attack.

Who can exploit CVE-2026-20308?

CVE-2026-20308 can be exploited by authenticated, remote attackers with low privileges.

What causes the vulnerability in CVE-2026-20308?

CVE-2026-20308 is caused by insufficient input validation in the web-based management interface.

How can I mitigate CVE-2026-20308?

To mitigate CVE-2026-20308, ensure your Cisco IOS XE Software is updated to the latest version that addresses this vulnerability.