RCE in Shenzhen Tvt Cctv-Dvr
CVE-2025-34036
An OS command injection vulnerability exists in white-labeled DVRs manufactured by TVT, affecting a custom HTTP service called "Cross Web Server" that listens on TCP ports 81 and 82. The web interface fails to sanitize input in the URI path passed to the language extraction functionality. When the server processes a request to /language/[lang]/index.html, it uses the [lang] input unsafely in a tar extraction command without proper escaping. This allows an unauthenticated remote attacker to inject shell commands and achieve arbitrary command execution as root. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.264 (97.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- disclosure@vulncheck.com (Exploit, technical-description, Third Party Advisory, exploit, third-party-advisory)
- disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit, third-party-advisory)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34036?
- CVE-2025-34036 is a critical-severity vulnerability in Shenzhen Tvt Cctv-Dvr, classified under OS Command Injection. CVSS score: 9.8/10. Published 2025-06-24.
- How severe is CVE-2025-34036?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-34036 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.