CVE-2025-34036Td-2004ts-Cl-C Firmware OS 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.
Published Jun 23, 2025 · Updated Apr 7, 2026
Key Facts
Patch immediately- CVE-2025-34036 is a critical-severity vulnerability (CVSS 10.0 v4) affecting Td-2004ts-Cl-C Firmware (Tvt), Td-2004ts-Cl Firmware (Tvt), Td-2008ts-Cl Firmware (Tvt) and 22 more products.
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Jun 23, 2025. Public exploit code is available.
- EPSS estimates a 31% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v4
10.0
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/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 (30-day exploit likelihood)
31%
Higher than 98.2% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
39/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jun 23, 2025
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
10
Reports of active use
Advisories And Exploit References
- advisoryVulnCheck exploitation report
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Jun 23, 2025 | n/a | Not reported |
| Industry KEV feed | Jun 23, 2025 | n/a | Not reported |
Affected Products
31 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Td-2004ts-Cl-C FirmwareTvt | See advisory | n/a |
| Td-2004ts-Cl FirmwareTvt | See advisory | n/a |
| Td-2008ts-Cl FirmwareTvt | See advisory | n/a |
| Td-2104ts-Cl-A FirmwareTvt | See advisory | n/a |
| Td-2104ts-Cl FirmwareTvt | See advisory | n/a |
Timeline
Publicly disclosed
Jun 23, 2025
Added to CIRCL KEV
Jun 23, 2025
Added to Industry KEV feed
Jun 23, 2025
Last updated
Apr 7, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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.
Affected: Td-2004ts-Cl-C Firmware (Tvt); Td-2004ts-Cl Firmware (Tvt); Td-2008ts-Cl Firmware (Tvt), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Jun 23, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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