Stack-Based Buffer Overflow in D-Link DIR-816L Router
CVE-2025-13189

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-13189?

A stack-based buffer overflow vulnerability exists in the D-Link DIR-816L router, specifically in the genacgi_main function of the gena.cgi file. By manipulating the SERVER_ID or HTTP_SID parameters, an unauthorized user may exploit this vulnerability remotely. This is particularly concerning as it affects versions of the product that are no longer supported by D-Link, meaning no patches or mitigations will be provided. The exploit has been publicly disclosed, raising the potential risk for users of this device.

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-2025-13189 - Proof of Concept

References

https://vuldb.com/?id.332478
vdb-entrytechnical-description
https://vuldb.com/?ctiid.332478
signaturepermissions-required
https://vuldb.com/?submit.685540
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
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-2025-13189 : Stack-Based Buffer Overflow in D-Link DIR-816L Router