CVE-2025-41706 Phoenix Contact: Webserver Denial of Service through Malformed Content-Length
An unauthenticated remote attacker can cause a denial of service on Phoenix Contact industrial UPS devices by sending a malformed GET request with an over-long content-length.
- 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-2025-41706?
CVE-2025-41706 is a medium-severity denial of service vulnerability in Phoenix Contact QUINT4-UPS/24DC/24DC/10/EIP, published on 14 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The webserver is vulnerable to a denial of service condition. An unauthenticated remote attacker can craft a special GET request with an over-long content-length to trigger the issue without affecting the core functionality.
Weakness: CWE-120
Which versions are affected by CVE-2025-41706?
How do I fix CVE-2025-41706?
No fix has been published for CVE-2025-41706 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-2025-41706 being exploited?
There is no known exploitation of CVE-2025-41706 in the wild and no public exploit code.
Sources
Also known as GHSA-hvfm-qx34-wp84.