Vulnerability in D-Link DIR-505 Router and Web Management Interface
CVE-2026-118579

9.3CRITICAL

Key Information:

Vendor

D-link
Status
Dir-505
Vendor
CVE Published:
28 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-118579?

A critical weakness has been identified in the D-Link DIR-505 version 1.10B02, specifically within the web management interface. The flaw exists in the 'main' function of the secmark1524.cgi file, which accepts user input parameters (accu, pass, code, hash, cmds) without proper validation. This oversight enables attackers to manipulate the arguments and create a backdoor, allowing unauthorized remote access to the router. The exploit is publicly available, posing a severe risk to users' networks, making immediate remediation essential.

Affected Version(s)

DIR-505 1.10B02

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-2026-118579 - Proof of Concept

References

https://vuldb.com/vuln/428018
vdb-entrytechnical-description
https://vuldb.com/vuln/428018/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-118579
third-party-advisory

CVSS V4

Score:
9.3
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)
.