Vulnerability Description
D-Link DCS-825L firmware version 1.08.01 and possibly prior versions contain an insecure implementation in the mydlink-watch-dog.sh script. The script monitors and respawns the `dcp` and `signalc` binaries without validating their integrity, origin, or permissions. An attacker with filesystem access (e.g., via UART or firmware modification) may replace these binaries to achieve persistent arbitrary code execution with root privileges. The issue stems from improper handling of executable trust and absence of integrity checks in the watchdog logic.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Dlink | Dcs-825L Firmware | <= 1.08.01 |
| Dlink | Dcs-825L | - |
Related Weaknesses (CWE)
References
- https://cybermaya.in/posts/Post-42/ExploitThird Party Advisory
- https://legacy.us.dlink.com/pages/product.aspx?id=f9c0458bfe7b4ff3bf7fad1cf6fcc9Product
- https://www.dlink.com/en/security-bulletin/Not Applicable
FAQ
What is CVE-2025-55581?
CVE-2025-55581 is a vulnerability with a CVSS score of 7.3 (HIGH). D-Link DCS-825L firmware version 1.08.01 and possibly prior versions contain an insecure implementation in the mydlink-watch-dog.sh script. The script monitors and respawns the `dcp` and `signalc` bin...
How severe is CVE-2025-55581?
CVE-2025-55581 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-55581?
Check the references section above for vendor advisories and patch information. Affected products include: Dlink Dcs-825L Firmware, Dlink Dcs-825L.