CVE-2026-51600 Denial of service in n/a
An unauthenticated remote attacker can cause a denial of service by sending malformed RTSP requests that leak TCP resources.
- 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-2026-51600?
CVE-2026-51600 is a high-severity denial of service vulnerability in n/a, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Tenda CP3 V3.0 firmware V31.1.9.91 does not validate the Content-Length header field in RTSP requests (including DESCRIBE, SETUP, and PLAY methods). When a request carrying a Content-Length header is received without a corresponding message body, the RTSP parser enters a persistent body-awaiting state, causing the affected TCP connection to become permanently non-functional. The device does not actively close the connection, resulting in a TCP resource leak. This issue can be exploited by an unauthenticated remote attacker to cause a denial-of-service condition.
Which versions are affected by CVE-2026-51600?
How do I fix CVE-2026-51600?
No fix has been published for CVE-2026-51600 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-2026-51600 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51600 exists.
Sources
Also known as GHSA-chqm-m3x4-h3rh.