CVE-2025-34036

Shenzhen TVT CCTV-DVR Command Injection

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.

Affected

Shenzhen TVT · CCTV-DVR

CVSS v4.0 VULNCHECK

10.0 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

30.91% chance of exploitation in the next 30 days, 98th percentile

Published

2025-06-24

Updated

2026-04-07

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/39596
• https://web.archive.org/web/20160322204109/http://www.kerneronsec.com/2016/02/remote-code…

Security advisories

• https://vulncheck.com/advisories/shenzhen-tvt-cctv-dvr-command-injection

References

• CVE Record
• NVD entry