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CVE-2025-34036

CRITICALCVSS 10/10EPSS 25.28%

Last modified

CVE-2025-34036 is a critical-severity vulnerability rated 10/10 on the CVSS scale. 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. EPSS estimates a 25.28% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

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

CVSS 4.0
10/10

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/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

EPSS Probability
25.28%

97.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
TvtTd-2108ts-Cl FirmwareAll versions
TvtTd-2108ts-Cl-A FirmwareAll versions
TvtTd-2116ts-Cl FirmwareAll versions
TvtTd-2104ts-Hc FirmwareAll versions
TvtTd-2108ts-Hc FirmwareAll versions
TvtTd-2116ts-Hc FirmwareAll versions
TvtTd-2104ts-Hp FirmwareAll versions
TvtTd-2108ts-Hp FirmwareAll versions
TvtTd-2116te-Hp FirmwareAll versions
TvtTd-2704ts-Hc FirmwareAll versions
TvtTd-2708ts-Hc FirmwareAll versions
TvtTd-2716te-Hc FirmwareAll versions
TvtTd-2716te-Hc-A FirmwareAll versions
TvtTd-2716tc-Hc FirmwareAll versions
TvtTd-2732tc-Hc FirmwareAll versions
TvtTd-2716td-Hc FirmwareAll versions
TvtTd-2732td-Hc FirmwareAll versions
TvtTd-2704ts-Hp FirmwareAll versions
TvtTd-2708ts-Hp FirmwareAll versions
TvtTd-2708te-Hp FirmwareAll versions
TvtTd-2716te-Hp FirmwareAll versions
TvtTd-2716te-Hp-A FirmwareAll versions
TvtTd-2716tc-Hp FirmwareAll versions
TvtTd-2708te-Hk FirmwareAll versions
TvtTd-2932td-Hp FirmwareAll versions
TvtTd-2004ts-Cl FirmwareAll versions
TvtTd-2004ts-Cl-C FirmwareAll versions
TvtTd-2104ts-Cl FirmwareAll versions
TvtTd-2104ts-Cl-A FirmwareAll versions
TvtTd-2008ts-Cl FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2025-34036?
CVE-2025-34036 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 25.28% probability of exploitation in the next 30 days.
How do I fix CVE-2025-34036?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-34036?

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Source: NVD / NIST