CVE-2025-8231: dir-890l Hardcoded Password — Exploit

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.

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CVSS v3.1 Score

6.8

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-259 CWE-259

CWE-798 CWE-798

Affected Products

Vendor	Product	Versions
dlink	dir-890l_firmware	< 1.11b04
dlink	dir-890l	All

References

Exploits

https://github.com/Nicholas-wei/bug-discovery/blob/main/dlink/dir890-hardcoded/dir890-hardcoded.md

Other References

https://vuldb.com/?ctiid.317819 https://vuldb.com/?id.317819 https://vuldb.com/?submit.622337 https://www.dlink.com/

Frequently Asked Questions

What is CVE-2025-8231? +

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. It has a CVSS v3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2025-8231? +

CVE-2025-8231 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-8231? +

CVE-2025-8231 affects products from dlink, specifically: dir-890l, dir-890l_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-8231? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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