Buffer Overflow in D-Link DIR-513 Router's Boa Webserver
CVE-2025-7909

8.7HIGH

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7909?

A buffer overflow vulnerability exists in the D-Link DIR-513 router's Boa Webserver, specifically within the sprintf function of the formLanSetupRouterSettings component. This issue arises from improper handling of the curTime argument, allowing remote attackers to exploit the flaw. The vulnerability primarily affects versions of the DIR-513 that are no longer supported, effectively making them susceptible to potential exploitation. Given that this vulnerability has been publicly disclosed, immediate action is advised to mitigate risks associated with unauthorized access or system compromise.

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-2025-7909 - Proof of Concept

References

https://vuldb.com/?id.317024
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317024
signaturepermissions-required
https://vuldb.com/?submit.618593
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

bazhuayu (VulDB User)
.
CVE-2025-7909 : Buffer Overflow in D-Link DIR-513 Router's Boa Webserver