TI-2025-07531 Aliases CVE-2025-8231 GHSA-85q8-9fqg-6jwh

D-Link DIR-890L UART Port rgbin hard-coded credentials

LOW 34CWE-259Published 2025-07-27 · Updated 2025-07-28

Key facts

Attack vector: Physical
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-259.

Summary

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 it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00785 56th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
D-Link	DIR-890L	111b04	—	No fix listed	CNA

DIR-890L VendorD-Link Affected 111b04 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:dlink:dir-890l_firmware::::::::	up to 1.11b04	Vulnerable	D-Link Japan K.K.
cpe:2.3:h:dlink:dir-890l:-:::::::*	not specified by NVD	Running on	D-Link Japan K.K.

cpe:2.3:o:dlink:dir-890l_firmware:*:*:*:*:*:*:*:* Versions up to 1.11b04 Vulnerable ·D-Link Japan K.K.
cpe:2.3:h:dlink:dir-890l:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·D-Link Japan K.K.

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-8231
2026-10-03 Alias added: GHSA-85q8-9fqg-6jwh

References

Exploit 1

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

Other 1

https://www.dlink.com/

TI-2024-03070 D-Link DNS-320L/DNS-325/DNS-327L/DNS-340L HTTP GET Request nas_sharing.cgi command injection KEVCVSS 3.1CRITICAL 9.8
TI-2024-03069 D-Link DNS-320L/DNS-325/DNS-327L/DNS-340L HTTP GET Request nas_sharing.cgi hard-coded credentials KEVCVSS 3.1CRITICAL 9.8
TI-2024-00708 D-Link DIR-859 HTTP POST Request hedwig.cgi path traversal KEVCVSS 3.1CRITICAL 9.8
TI-2023-10693 OS Command injection vulnerability in D-Link DIR820LA1_FW105B03 allows attackers to… KEVCVSS 3.1CRITICAL 9.8
TI-2022-17249 D-Link Go-RT-AC750 GORTAC750_revA_v101b03 and GO-RT-AC750_revB_FWv200b02 are vulnerable… KEVCVSS 3.1CRITICAL 9.8
TI-2022-09657 D-Link DIR-820L 1.05B03 was discovered to contain remote command execution (RCE)… KEVCVSS 3.1CRITICAL 9.8

See all 979 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences