CVE-2026-51603 (GCVE-0-2026-51603)

Vulnerability from cvelistv5 – Published: 2026-07-09 00:00 – Updated: 2026-07-09 17:47
VLAI
Summary
A stack-based buffer overflow vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) allows an unauthenticated remote attacker to cause a denial of service via a crafted second SETUP request. After completing the OPTIONS, DESCRIBE, and a legitimate first SETUP request to obtain a valid session ID, the RTSP service's second-stage URL routing parser fails to validate the length of the URL field in the subsequent SETUP request. By supplying a URL consisting of exactly four consecutive repetitions of a valid RTSP URL, an attacker can bypass first-stage format validation and trigger a stack buffer overflow, causing an immediate crash of the RTSP service process and rendering the device inaccessible to all clients on the local network.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 17:46 UTC
CWE
  • n/a
  • CWE-121 - Stack-based Buffer Overflow
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2263 records in the last 180 days details
References
Show details on NVD website
To clipboard 

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