Shenzhen TVT CCTV-DVR: attackers can run commands on it
OFFICIAL NAME: Shenzhen TVT CCTV-DVR Command Injection
WHAT IT IS · ROUTERS, CAMERAS AND DEVICESRouters, cameras and recorders are often forgotten and rarely updated.
DO THIS FIRSTUpdate it or replace it. Never leave its admin page open to the internet. Not sure if you use it? Send this page to your IT provider or security lead and ask.
TECHNICAL SUMMARY 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.
WHY THIS VERDICT Attack attempts are confirmed, with no confirmed exploitation yet.
WHY IT RANKS HERE The first report is 20 days old.
- HIGHEST CONFIRMED RUNG
- TRIED
- CISA KEV
- NOT YET
- EXPLOIT CODE
- PROOF OF CONCEPT
How far has it climbed?
01 TALK
□ NO EVIDENCE YETNEWEST EVIDENCE NONE YETNo evidence yet.
SRC: NONE YET02 EXPOSED
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETWe have no source that counts exposed systems yet. Internet scan data needs a partnership we do not have. No evidence here does not mean nothing is exposed.
03 TRIED
■ CONFIRMEDNEWEST EVIDENCE · 1 SOURCEAttack attempts on CVE-2025-34036 seen by honeypots (Shadowserver via CIRCL). Attack attempts on CVE-2025-34036 seen by honeypots (Shadowserver via CIRCL).
04 EXPLOITED
□ NO EVIDENCE YETNEWEST EVIDENCE NONE YETNo evidence yet.
SRC: NONE YET05 DAMAGE
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETBreach notices and filings rarely name the flaw that was used, so we cannot link them to this event yet. No evidence here does not mean no harm.
When each thing happened
- DISCLOSED
- EXPLOIT CODE PUBLICDATE UNKNOWN
- FIRST ATTACK REPORT
- CISA KEV LISTINGNOT YET
- US FEDERAL DEADLINENOT YET
Questions to ask this week
- Do we run Shenzhen TVT CCTV-DVR? If yes, is it patched or cut off from the internet?
- Who owns fixing it, and by what date?
- Have we checked for signs of attack since the first report, not just since the patch?
How it unfolded
- JUN 23, 2025CISA Vulnrichment notes a public proof of concept for CVE-2025-34036
- Attack activity. OCT 21, 2026Attack attempts on CVE-2025-34036 seen by honeypots (Shadowserver via CIRCL) (2 reports, latest OCT 22)