Stack-based Buffer Overflow in Tenda AC20 Router
CVE-2025-8131

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
25 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8131?

A stack-based buffer overflow vulnerability exists in the Tenda AC20 router version 16.03.08.05, specifically within the functionality of the /goform/SetStaticRouteCfg file. This flaw arises from improper handling of argument lists, permitting remote attackers to potentially execute arbitrary code. Due to the public disclosure of this exploit, it poses a significant security risk to users of the affected router model.

Affected Version(s)

AC20 16.03.08.05

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-2025-8131 - Proof of Concept

References

https://vuldb.com/?id.317527
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317527
signaturepermissions-required
https://vuldb.com/?submit.619769
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

liuchangwei (VulDB User)
.
CVE-2025-8131 : Stack-based Buffer Overflow in Tenda AC20 Router