Quick answers
- Is CVE-2026-51602 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-51602 being exploited in the wild.
- How severe is CVE-2026-51602?
- Informational severity, published 9 July 2026.
- Which products and versions are affected?
- Tenda CP3 V31.1.9.91.
- Is there a fix for CVE-2026-51602?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-51602 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-51602?
- Check whether you run Tenda CP3 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow exists in the RTSP service of Tenda CP3 V3.0 firmware V31.1.9.91. The vulnerability is located in the second-stage URL routing parser, which fails to validate the length of the URL field during the initial SETUP request. An unauthenticated remote attacker can bypass first-stage format validation by supplying a URL containing four consecutive repetitions of a valid RTSP URL. This triggers the overflow, leading to a process crash and a denial-of-service (DoS) condition for the device's RTSP functionality.
Affected products
- Tenda CP3 V3.0 V31.1.9.91
Timeline
- 2026-07-09: disclosed
- 2026-07-09: advisory