Stack-based Buffer Overflow Vulnerability in D-Link DIR-816 Router
CVE-2025-5622

9.3CRITICAL

Key Information:

Vendor

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

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5622?

A stack-based buffer overflow vulnerability exists in the D-Link DIR-816 router, specifically in the wirelessApcli_5g function located at /goform/wirelessApcli_5g. This issue arises due to improper handling of parameters such as apcli_mode_5g, apcli_enc_5g, and apcli_default_key_5g. The vulnerability allows an attacker to execute a remote exploit, which could compromise the router's functionality. Affected users should be aware that this flaw impacts only those versions of the product that are no longer supported by the vendor, emphasizing the importance of keeping devices updated and secure.

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-2025-5622 - Proof of Concept

References

https://vuldb.com/?id.311108
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311108
signaturepermissions-required
https://vuldb.com/?submit.589222
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

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CVE-2025-5622 : Stack-based Buffer Overflow Vulnerability in D-Link DIR-816 Router