CVE-2025-8231
D-Link DIR-890L UART Port Hard-Coded Credentials Vulnerability
Description
A vulnerability, which was classified as critical, has been found in D-Link DIR-890L up to 111b04. This issue affects some unknown processing of the file rgbin of the component UART Port. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the physical device. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
INFO
Published Date :
July 27, 2025, 2:15 p.m.
Last Modified :
Aug. 6, 2025, 5:01 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Ensure the device is not using default or hard-coded credentials.
- Replace unsupported devices with maintained alternatives.
- Remove the UART port if not essential for operation.
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-2025-8231.
| URL | Resource |
|---|---|
| https://github.com/Nicholas-wei/bug-discovery/blob/main/dlink/dir890-hardcoded/dir890-hardcoded.md | Exploit |
| https://vuldb.com/?ctiid.317819 | Permissions Required VDB Entry |
| https://vuldb.com/?id.317819 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.622337 | Third Party Advisory VDB Entry |
| https://www.dlink.com/ | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-8231 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-2025-8231
weaknesses.
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-2025-8231 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-8231 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]
Aug. 06, 2025
Action Type Old Value New Value Added CWE CWE-798 Added CPE Configuration AND OR *cpe:2.3:o:dlink:dir-890l_firmware:*:*:*:*:*:*:*:* versions up to (including) 1.11b04 OR cpe:2.3:h:dlink:dir-890l:-:*:*:*:*:*:*:* Added Reference Type VulDB: https://github.com/Nicholas-wei/bug-discovery/blob/main/dlink/dir890-hardcoded/dir890-hardcoded.md Types: Exploit Added Reference Type VulDB: https://vuldb.com/?ctiid.317819 Types: Permissions Required, VDB Entry Added Reference Type VulDB: https://vuldb.com/?id.317819 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.622337 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://www.dlink.com/ Types: Product -
New CVE Received by [email protected]
Jul. 27, 2025
Action Type Old Value New Value Added Tag unsupported-when-assigned Added Description A vulnerability, which was classified as critical, has been found in D-Link DIR-890L up to 111b04. This issue affects some unknown processing of the file rgbin of the component UART Port. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the physical device. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer. Added CVSS V4.0 AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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 Added CVSS V3.1 AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V2 (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CWE CWE-798 Added CWE CWE-259 Added Reference https://github.com/Nicholas-wei/bug-discovery/blob/main/dlink/dir890-hardcoded/dir890-hardcoded.md Added Reference https://vuldb.com/?ctiid.317819 Added Reference https://vuldb.com/?id.317819 Added Reference https://vuldb.com/?submit.622337 Added Reference https://www.dlink.com/