Buffer Overflow Vulnerability in Tenda AC20 Router
CVE-2025-10120

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
9 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-10120?

A buffer overflow vulnerability has been identified in the Tenda AC20 router, affecting versions up to 16.03.08.12. The flaw resides in the 'strcpy' function of the '/goform/GetParentControlInfo' endpoint. By manipulating the argument 'mac', an attacker can exploit this vulnerability remotely. Given that the exploit is now public, it poses a significant security threat to users of the affected products. Immediate action is recommended to secure the devices.

Affected Version(s)

AC20 16.03.08.0

AC20 16.03.08.1

AC20 16.03.08.2

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-2025-10120 - Proof of Concept

References

https://vuldb.com/?id.323089
vdb-entrytechnical-description
https://vuldb.com/?ctiid.323089
signaturepermissions-required
https://vuldb.com/?submit.645680
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

cymiao (VulDB User)
.