CVE-2025-20196 Denial of service in Cisco IOS XE Software
Unauthenticated remote attackers can cause a denial of service in Cisco IOx by sending crafted HTTP requests, requiring manual process restart.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-20196?
CVE-2025-20196 is a medium-severity denial of service vulnerability in Cisco Ios Xe, published on 7 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Cisco IOx application hosting environment of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the Cisco IOx application hosting environment to stop responding, resulting in a denial of service (DoS) condition. This vulnerability is due to the improper handling of HTTP requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to cause the Cisco IOx application hosting environment to stop responding. The IOx process will need to be manually restarted to recover services.
Weakness: CWE-307
Which versions are affected by CVE-2025-20196?
It affects 7 products.
Products include Cisco 807 Industrial Integrated Services Router Firmware, Cisco 809 Industrial Integrated Services Router Firmware, Cisco 829 Industrial Integrated Services Router Firmware, Cisco Cgr1000 Firmware, Cisco Ic3000 Industrial Compute Gateway Firmware, Cisco Ios Xe and 1 more.
How do I fix CVE-2025-20196?
No fix has been published for CVE-2025-20196 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-2025-20196 being exploited?
There is no known exploitation of CVE-2025-20196 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xe
Sources
Also known as GHSA-mqph-g74f-5j5f.