Stack-Based Buffer Overflow in D-Link DIR-868L Authentication Component
CVE-2026-94089

10CRITICAL

Key Information:

Vendor

D-link
Status
Dir-868l
Vendor
CVE Published:
20 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-94089?

A stack-based buffer overflow vulnerability exists in the authentication component of the D-Link DIR-868L firmware version 2.01b05. This security issue arises from improper handling of the 'strcpy' function within the '/webfa_authentication.cgi' file. By manipulating the 'id' or 'password' parameters, an attacker can remotely execute arbitrary code, potentially compromising the device's integrity. The vulnerability is publicly disclosed, making it urgent for users to apply appropriate security measures.

Affected Version(s)

DIR-868L 2.01b05

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-2026-94089 - Proof of Concept

References

https://vuldb.com/vuln/408017
vdb-entrytechnical-description
https://vuldb.com/vuln/408017/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-94089
third-party-advisory

CVSS V4

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
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

Walnut1337 (VulDB User)
.