CVE-2025-55581
D-Link DCS-825L firmware version 1.08.01 and possibly prior versions contain an insecure implementation in the mydlink-watch-dog.sh script.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-269, CWE-306, CWE-494
- Affected
- dlink/dcs-825l firmware
- Source
- cve@mitre.org
References
- https://cybermaya.in/posts/Post-42/Exploit, Third Party Advisory
- https://legacy.us.dlink.com/pages/product.aspx?id=f9c0458bfe7b4ff3bf7fad1cf6fcc9a1Product
- https://www.dlink.com/en/security-bulletin/Not Applicable
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.