CVE-2025-34036 | An OS command injection vulnerability exists in white-labele… | CVSS 10.0 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2025-34036
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2025-04-15 19:15 UTC
Published: 2025-06-24 01:00 UTC
Last updated: 2026-04-07 14:09 UTC
Primary CWE: CWE-78
CWE-78 Improper Neutralization of Special Elements used in a…
Vendor / Product: Shenzhen TVT / CCTV-DVR
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Shenzhen TVT	CCTV-DVR	—	—

Weakness (CWE)

CWE	Source	Description
CWE-78	cna	CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References (3)