Hard-Coded Credentials Vulnerability in D-Link DIR-890L
CVE-2025-8231

7HIGH

Key Information:

Vendor

D-link
Status
Dir-890l
Vendor
CVE Published:
27 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8231?

A vulnerability exists in the D-Link DIR-890L router in versions up to 111b04, where improper handling of the UART Port component leads to the exposure of hard-coded credentials. This issue can be exploited on physical devices, allowing unauthorized access to the router's functionality. It is important to note that this vulnerability affects devices that are no longer actively supported by the vendor.

Affected Version(s)

DIR-890L 111b04

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-8231 - Proof of Concept

References

https://vuldb.com/?id.317819
vdb-entry
https://vuldb.com/?ctiid.317819
signaturepermissions-required
https://vuldb.com/?submit.622337
third-party-advisory

CVSS V4

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Physical
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

nich0las (VulDB User)
.
CVE-2025-8231 : Hard-Coded Credentials Vulnerability in D-Link DIR-890L