# CVE-2026-51600: Tenda CP3 DoS via improper RTSP Content-Length validation

Source: https://junglewise.ai/threats/cve-2026-51600-tenda-cp3-dos-via-improper-rtsp-content-length-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-09. Updated: 2026-07-09  
License: CC BY 4.0 with a link back

CVE-2026-51600 · Severity: info · CVSS 5.3 · Published 2026-07-09

A vulnerability in Tenda CP3 security cameras allows an attacker to disable the device's video streaming capabilities remotely. By sending a specially crafted network request, an attacker can cause the camera to stop responding to legitimate connections. This results in a denial-of-service where the camera can no longer be accessed for monitoring purposes.

Technologies: [Tenda CP3](https://junglewise.ai/threats/technologies/cp3). Vendors: [Tenda](https://junglewise.ai/threats/vendors/tenda).

## Quick answers

**Is CVE-2026-51600 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-51600 being exploited in the wild.

**How severe is CVE-2026-51600?** Informational severity, with a CVSS score of 5.3, published 9 July 2026.

**Which products and versions are affected?** Tenda CP3 V31.1.9.91.

**Is there a fix for CVE-2026-51600?** 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-2026-51600 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-51600?** 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

The Tenda CP3 V3.0 (firmware V31.1.9.91) RTSP parser fails to validate the Content-Length header field during DESCRIBE, SETUP, and PLAY requests. When a request specifies a Content-Length but provides no message body, the parser enters a persistent 'body-awaiting' state. Because the device does not implement a timeout or actively close these stalled connections, it suffers from a TCP resource leak. An unauthenticated remote attacker can exploit this to exhaust available connections, leading to a permanent denial-of-service (DoS) condition for the RTSP service.

## Affected products

- Tenda CP3 V3.0 V31.1.9.91

## Timeline

- 2026-07-09: disclosed: Initial vulnerability disclosure and CVE assignment.
- 2026-07-09: advisory: NVD published the CVE record.

## References

- [https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0/Tenda_CP3_V3.0_1th/README.md](https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0/Tenda_CP3_V3.0_1th/README.md)

## Related threats

- [Tenda CP3 privilege escalation in redirect server](https://junglewise.ai/threats/cve-2026-86153-tenda-cp3-privilege-escalation-in-redirect-server)
- [Tenda CP3 OS command injection in AutoAddWifi](https://junglewise.ai/threats/cve-2026-86152-tenda-cp3-os-command-injection-in-autoaddwifi)
- [Tenda CP3 OS command injection in Network Configuration Management](https://junglewise.ai/threats/cve-2026-86151-tenda-cp3-os-command-injection-in-network-configuration)
- [Tenda CP3 hard-coded credentials in hostapd configuration](https://junglewise.ai/threats/cve-2026-86150-tenda-cp3-hard-coded-credentials-in-hostapd-configuration)
- [Tenda CP3 OS command injection via interface_name argument](https://junglewise.ai/threats/cve-2026-86149-tenda-cp3-os-command-injection-via-interface-name-argument)