Stack-based Buffer Overflow in D-Link DIR-816
CVE-2025-5624

9.3CRITICAL

Key Information:

Vendor

D-link
Status
Dir-816
Vendor
CVE Published:
5 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5624?

A vulnerability exists in the D-Link DIR-816 device, specifically in the QoSPortSetup functionality, where manipulation of certain arguments can lead to a stack-based buffer overflow. This issue can be exploited remotely, allowing attackers to potentially execute arbitrary code or cause system instability. The products affected are no longer supported by the vendor, increasing the risk of exploitation since security patches are not being provided. Awareness and mitigation strategies are essential for users of these devices.

Affected Version(s)

DIR-816 1.10CNB05

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-2025-5624 - Proof of Concept

References

https://vuldb.com/?id.311110
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311110
signaturepermissions-required
https://vuldb.com/?submit.589226
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

pjqwudi (VulDB User)
.
CVE-2025-5624 : Stack-based Buffer Overflow in D-Link DIR-816