CVE-2025-20192 Denial of service in Cisco IOS XE Software

High 7.7 Published 7 May 2025 Updated 7 May 2025

An authenticated remote attacker with valid IKEv1 credentials can cause a Cisco IOS XE device to reload by sending crafted IKEv1 messages.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20192?

CVE-2025-20192 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 7 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in the Internet Key Exchange version 1 (IKEv1) implementation of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The attacker must have valid IKEv1 VPN credentials to exploit this vulnerability. This vulnerability is due to improper validation of IKEv1 phase 2 parameters before the IPsec security association creation request is handed off to the hardware cryptographic accelerator of an affected device. An attacker could exploit this vulnerability by sending crafted IKEv1 messages to the affected device. A successful exploit could allow the attacker to cause the device to reload.

Weakness: CWE-232

Which versions are affected by CVE-2025-20192?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2025-20192?

No fix has been published for CVE-2025-20192 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-2025-20192 being exploited?

There is no known exploitation of CVE-2025-20192 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-ffcc-cqg6-6f7v.