CVE-2025-20202 Denial of service in Cisco IOS XE Software

High 7.4 Published 7 May 2025 Updated 7 May 2025

An unauthenticated adjacent attacker can cause a denial of service on Cisco IOS XE Wireless Controllers by sending crafted CDP packets to an access point.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20202?

CVE-2025-20202 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 7 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in Cisco IOS XE Wireless Controller Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of access point (AP) Cisco Discovery Protocol (CDP) neighbor reports when they are processed by the wireless controller. An attacker could exploit this vulnerability by sending a crafted CDP packet to an AP. A successful exploit could allow the attacker to cause an unexpected reload of the wireless controller that is managing the AP, resulting in a DoS condition that affects the wireless network.

Weakness: CWE-805

Which versions are affected by CVE-2025-20202?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2025-20202?

No fix has been published for CVE-2025-20202 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-20202 being exploited?

There is no known exploitation of CVE-2025-20202 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-cxrm-7jrj-hp84.