Authentication Flaw in D-Link DIR-823X Router
CVE-2026-1685

6.3MEDIUM

Key Information:

Vendor

D-link
Status
Dir-823x
Vendor
CVE Published:
30 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1685?

A vulnerability exists in the D-Link DIR-823X router's login functionality, specifically within the sub_40AC74 component. This flaw allows unauthorized manipulation leading to improper restriction of excessive authentication attempts. Exploitation can be performed remotely, posing a significant risk to network security. Although the complexity of executing this attack is high, the exploit is publicly accessible, increasing the urgency for users to secure their devices.

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Affected Version(s)

DIR-823X 250416

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-2026-1685 - Proof of Concept

References

https://vuldb.com/?id.343479
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343479
signaturepermissions-required
https://vuldb.com/?submit.740886
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

942384053 (VulDB User)
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