Buffer Overflow Vulnerability in Tenda AC5 Router
CVE-2026-4905

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac5
Vendor
CVE Published:
26 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4905?

A critical security flaw exists in the Tenda AC5 router due to a stack-based buffer overflow in the 'formWifiWpsOOB' function. This vulnerability is triggered by manipulating specific arguments in the POST Request Handler. If exploited, attackers could execute arbitrary code remotely. As the details of this exploit have been publicly released, it poses a significant threat to users of the Tenda AC5 router. Immediate action is advised to protect devices from potential unauthorized access.

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Affected Version(s)

AC5 15.03.06.47

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-2026-4905 - Proof of Concept

References

https://vuldb.com/?id.353656
vdb-entrytechnical-description
https://vuldb.com/?ctiid.353656
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https://vuldb.com/?submit.777393
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

wxhwxhwxh_mie (VulDB User)
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