Stack-Based Buffer Overflow in Tenda AC5 Router
CVE-2026-4902

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac5
Vendor
CVE Published:
26 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4902?

A vulnerability exists in Tenda's AC5 router that allows for a stack-based buffer overflow through improper handling of a POST request in the addressNat component. This flaw occurs when the argument 'page' is manipulated by an attacker, potentially leading to unauthorized remote access and system compromise. With the exploit now publicly available, it is crucial for users of the affected Tenda AC5 version to take immediate action to mitigate risks.

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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-2026-4902 - Proof of Concept

References

https://vuldb.com/?id.353653
vdb-entrytechnical-description
https://vuldb.com/?ctiid.353653
signaturepermissions-required
https://vuldb.com/?submit.777378
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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