Quick answers
- Is CVE-2026-51601 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-51601 being exploited in the wild.
- How severe is CVE-2026-51601?
- Informational severity, published 9 July 2026.
- Which products and versions are affected?
- Tenda CP3 V3.0 firmware V31.1.9.91.
- Is there a fix for CVE-2026-51601?
- 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-2026-51601 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-51601?
- Check whether you run Tenda CP3 V3.0 firmware 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 (Real Time Streaming Protocol) service of Tenda CP3 V3.0 firmware V31.1.9.91. The vulnerability is located in the processing of the 'Range' header field within a PLAY request, specifically due to a lack of length validation for the 'clock=' value. An unauthenticated remote attacker who has established a standard RTSP session handshake can trigger the overflow by providing an oversized string. This leads to a denial-of-service (DoS) condition by crashing the RTSP service. While the advisory focuses on the crash, stack overflows can sometimes lead to remote code execution depending on device protections.
Affected products
- Tenda CP3 V3.0 firmware V31.1.9.91
Timeline
- 2026-07-09: disclosed
- 2026-07-09: advisory