Stack-Based Buffer Overflow in D-Link DIR-816 Router
CVE-2026-4183

9.3CRITICAL

Key Information:

Vendor

D-link
Status
Dir-816
Vendor
CVE Published:
15 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4183?

A stack-based buffer overflow vulnerability has been identified in the D-Link DIR-816 router, specifically within the form2WlanBasicSetup.cgi file of the goahead component. This flaw arises from improperly handled parameters, allowing remote attackers to manipulate the 'pskValue' argument. Exploitation of this vulnerability enables unauthorized access and potential control over the device. It is important to note that this issue affects devices that are no longer supported by D-Link, making them particularly susceptible to attacks.

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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-2026-4183 - Proof of Concept

References

https://vuldb.com/?id.351087
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351087
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https://vuldb.com/?submit.769831
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)
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