CVE-2025-34036
Published: 24 June 2025
Summary
CVE-2025-34036 is a critical-severity OS Command Injection (CWE-78) vulnerability in Tvt Td-2108Ts-Cl Firmware. Its CVSS base score is 10.0 (Critical).
Operationally, ranked in the top 4.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
An OS command injection vulnerability exists in white-labeled DVRs manufactured by TVT, specifically within a custom HTTP service called "Cross Web Server" that listens on TCP ports 81 and 82. The web interface does not sanitize input in the URI path supplied to the language extraction functionality. When processing requests to /language/[lang]/index.html, the server passes the [lang] value directly into a tar extraction command without proper escaping, enabling command injection. The flaw is tracked as CWE-78 and carries a CVSS 4.0 score of 10.0.
An unauthenticated remote attacker can supply a malicious URI path to inject and execute arbitrary shell commands as root on the affected device. No authentication or user interaction is required, and the attack can be launched over the network against any exposed instance of the service.
Exploitation evidence for this issue was recorded by the Shadowserver Foundation on 2025-02-06 UTC, prior to the CVE's publication date. The associated EPSS score reached a peak of 0.1933 with no material increase from a lower baseline.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-18965
Vulnerability details
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…
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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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.