# CVE-2026-51605: Tenda CP3 stack buffer overflow in RTSP service

Source: https://junglewise.ai/threats/cve-2026-51605-tenda-cp3-stack-buffer-overflow-in-rtsp-service  
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-2026-51605 · Severity: info · Published 2026-07-09

A security vulnerability exists in the Tenda CP3 IP camera, a device used for remote video monitoring. An attacker on the same network can send a specially crafted request to the camera's video streaming service, causing it to crash. This results in a denial of service where the camera stops recording or streaming video, and the official mobile app loses its connection to the device.

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

## Quick answers

**Is CVE-2026-51605 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-51605 being exploited in the wild.

**How severe is CVE-2026-51605?** Informational severity, published 9 July 2026.

**Which products and versions are affected?** Tenda CP3 V31.1.9.991.

**Is there a fix for CVE-2026-51605?** 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-2026-51605 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-51605?** 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 the Tenda CP3 IP camera due to insufficient length validation during URL routing and path extraction. The service utilizes a two-stage validation process for TEARDOWN requests; while the first stage checks format, the second stage fails to validate the length of the URL field during parsing. An unauthenticated attacker can trigger the overflow by establishing a valid RTSP session (completing OPTIONS, DESCRIBE, SETUP, and PLAY sequences) and then sending a TEARDOWN request containing five consecutive repetitions of a valid RTSP URL. This bypasses initial checks and overflows the stack buffer during route parsing, leading to a process crash and the closure of TCP port 554.

## Affected products

- Tenda CP3 V3.0 V31.1.9.991

## Timeline

- 2026-07-09: disclosed: CVE-2026-51605 published

## References

- [https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0_7th/README.md](https://github.com/kkkk2222874/cve_ID_report/blob/main/Tenda_CP3_V3.0/Tenda_CP3_V3.0_7th/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)