Stack-Based Buffer Overflow in Tenda AC20 Router
CVE-2025-9087

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
16 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9087?

A stack-based buffer overflow vulnerability has been identified in the Tenda AC20 router, specifically within the SetNetControlList component's set_qosMib_list function. This flaw allows attackers to manipulate the argument list, resulting in a potential overflow that can be triggered remotely. The exploit is publicly documented, raising concerns for users' security as it could lead to unauthorized control over the affected device.

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Affected Version(s)

AC20 16.03.08.12

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-2025-9087 - Proof of Concept

References

https://vuldb.com/?id.320355
vdb-entrytechnical-description
https://vuldb.com/?ctiid.320355
signaturepermissions-required
https://vuldb.com/?submit.632037
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

n0ps1ed (VulDB User)
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