Stack-Based Buffer Overflow in Tenda AC20 Router
CVE-2025-9088

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
16 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9088?

A stack-based buffer overflow vulnerability has been identified in the Tenda AC20 router, specifically in the save_virtualser_data function of the /goform/formSetVirtualSer file. This vulnerability stems from improper handling of input arguments, allowing an attacker to manipulate the argument list. The exploitation of this vulnerability can be executed remotely, posing a significant risk to affected users. The details surrounding this vulnerability have been publicly disclosed, raising the urgency for users to apply necessary patches or mitigations.

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-2025-9088 - Proof of Concept

References

https://vuldb.com/?id.320356
vdb-entrytechnical-description
https://vuldb.com/?ctiid.320356
signaturepermissions-required
https://vuldb.com/?submit.632038
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)
.
CVE-2025-9088 : Stack-Based Buffer Overflow in Tenda AC20 Router