CVE-2025-8231: A vulnerability, which was classified as critical, has been found in D-Link DIR-890L up to 111b04

Q: How do I fix CVE-2025-8231?

dir-890l firmware: upgrade to newer than 1.11b04. Exact commands for each OS are on this page.

Q: Is CVE-2025-8231 being exploited?

CVE-2025-8231 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-8231 affect?

CVE-2025-8231 affects dir-890l firmware. Severity is medium (CVSS 6.8). 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

Q: How urgent is CVE-2025-8231?

Priority 43/100. Public exploit reference

This month

MEDIUM 6.8UPGRADE

CVE-2025-8231 is a medium-severity flaw (CVSS 6.8) affecting dir-890l firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-259, CWE-798
Published	2025-07-27
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: dlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-27 14:15 UTCPublished CVE record published
2026-06-17 10:06 UTCUpdated Record last modified

dlink dir-890l firmware UPGRADE

Affected: <= 1.11b04

Fixed in: newer than 1.11b04

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-8231?

dir-890l firmware: upgrade to newer than 1.11b04. Exact commands for each OS are on this page.

Is CVE-2025-8231 being exploited?

CVE-2025-8231 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-8231 affect?

CVE-2025-8231 affects dir-890l firmware. Severity is medium (CVSS 6.8). 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

How urgent is CVE-2025-8231?

Priority 43/100. Public exploit reference

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-4340 MEDIUM 6.3 UPGRADE UPGRADE A vulnerability classified as critical has been found in D-Link DIR-890L and DIR-806A1 up to 100CNb11/108B03

References

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