D-Link DIR-816L authentication.cgi authenticationcgi_main stack-based overflow
CVE-2025-13188

9.3CRITICAL

Key Information:

Vendor

D-link
Status
Dir-816l
Vendor
CVE Published:
14 November 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-13188?

A vulnerability was detected in D-Link DIR-816L 2_06_b09_beta. Affected by this vulnerability is the function authenticationcgi_main of the file /authentication.cgi. Performing manipulation of the argument Password results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Affected Version(s)

DIR-816L 2_06_b09_beta

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-2025-13188 - Proof of Concept

References

https://vuldb.com/?id.332476
vdb-entrytechnical-description
https://vuldb.com/?ctiid.332476
signaturepermissions-required
https://vuldb.com/?submit.685538
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

Lexpl0it (VulDB User)
JSON
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CVE-2025-13188 : Stack-Based Buffer Overflow in D-Link DIR-816L Router