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7.3
HIGH CVSS 3.1
CVE-2025-55581
D-Link DCS-825L Persistent Root Code Execution 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.

INFO

Published Date :

Aug. 22, 2025, 6:15 p.m.

Last Modified :

Sept. 12, 2025, 7:16 p.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-55581 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Dlink dcs-825l
2 Dlink dcs-825l_firmware
: Total Affected Vendor : 1 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
Update firmware and validate monitored binaries to prevent unauthorized code execution.
  • Ensure firmware is updated to the latest version.
  • Validate integrity of monitored binaries.
  • Implement strict file permission checks.
  • Harden watchdog script execution.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-55581.

URL Resource
https://cybermaya.in/posts/Post-42/ Third Party Advisory Exploit
https://legacy.us.dlink.com/pages/product.aspx?id=f9c0458bfe7b4ff3bf7fad1cf6fcc9a1 Product
https://www.dlink.com/en/security-bulletin/ Not Applicable
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-55581 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-55581 weaknesses.

CAPEC-58: Restful Privilege Elevation Restful Privilege Elevation CAPEC-122: Privilege Abuse Privilege Abuse CAPEC-233: Privilege Escalation Privilege Escalation CAPEC-12: Choosing Message Identifier Choosing Message Identifier CAPEC-36: Using Unpublished Interfaces or Functionality Using Unpublished Interfaces or Functionality CAPEC-62: Cross Site Request Forgery Cross Site Request Forgery CAPEC-166: Force the System to Reset Values Force the System to Reset Values CAPEC-216: Communication Channel Manipulation Communication Channel Manipulation CAPEC-184: Software Integrity Attack Software Integrity Attack CAPEC-185: Malicious Software Download Malicious Software Download CAPEC-186: Malicious Software Update Malicious Software Update CAPEC-187: Malicious Automated Software Update via Redirection Malicious Automated Software Update via Redirection CAPEC-533: Malicious Manual Software Update Malicious Manual Software Update CAPEC-538: Open-Source Library Manipulation Open-Source Library Manipulation CAPEC-657: Malicious Automated Software Update via Spoofing Malicious Automated Software Update via Spoofing CAPEC-662: Adversary in the Browser (AiTB) Adversary in the Browser (AiTB) CAPEC-691: Spoof Open-Source Software Metadata Spoof Open-Source Software Metadata CAPEC-692: Spoof Version Control System Commit Metadata Spoof Version Control System Commit Metadata CAPEC-693: StarJacking StarJacking CAPEC-695: Repo Jacking Repo Jacking

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-55581 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-55581 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Sep. 12, 2025

    Action Type Old Value New Value
    Added CPE Configuration AND OR *cpe:2.3:o:dlink:dcs-825l_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.08.01 OR cpe:2.3:h:dlink:dcs-825l:-:*:*:*:*:*:*:*
    Added Reference Type MITRE: https://cybermaya.in/posts/Post-42/ Types: Exploit, Third Party Advisory
    Added Reference Type MITRE: https://legacy.us.dlink.com/pages/product.aspx?id=f9c0458bfe7b4ff3bf7fad1cf6fcc9a1 Types: Product
    Added Reference Type MITRE: https://www.dlink.com/en/security-bulletin/ Types: Not Applicable
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 22, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
    Added CWE CWE-306
    Added CWE CWE-269
    Added CWE CWE-494
  • New CVE Received by [email protected]

    Aug. 22, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://cybermaya.in/posts/Post-42/
    Added Reference https://legacy.us.dlink.com/pages/product.aspx?id=f9c0458bfe7b4ff3bf7fad1cf6fcc9a1
    Added Reference https://www.dlink.com/en/security-bulletin/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact