Stack-Based Buffer Overflow in D-Link DIR-513 Router
CVE-2025-8159

8.7HIGH

Key Information:

Vendor

D-link
Status
Dir-513
Vendor
CVE Published:
25 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8159?

A significant vulnerability exists in the D-Link DIR-513 router related to the formLanguageChange function in the HTTP POST Request Handler. The issue arises from improper handling of the curTime argument, leading to a stack-based buffer overflow. This vulnerability enables attackers to execute arbitrary code remotely, particularly impacting devices that are no longer supported by D-Link. Exploitation of this flaw poses serious security risks, making devices susceptible to unauthorized access and control.

Affected Version(s)

DIR-513 1.0

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-2025-8159 - Proof of Concept

References

https://vuldb.com/?id.317573
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317573
signaturepermissions-required
https://vuldb.com/?submit.620604
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

Weining Xiao (VulDB User)
.