Buffer Overflow in Tenda AC6 Routers
CVE-2025-5854

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac6
Vendor
CVE Published:
9 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5854?

A buffer overflow vulnerability exists in the Tenda AC6 router affecting the AdvSetLanip functionality. Exploiting this vulnerability involves manipulating the 'lanMask' argument in the '/goform/AdvSetLanip' file, allowing attackers to execute external commands remotely. This risk is heightened due to the public disclosure of the exploit, making it crucial for users to patch affected devices immediately to avoid potential unauthorized access.

Affected Version(s)

AC6 15.03.05.16

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-2025-5854 - Proof of Concept

References

https://vuldb.com/?id.311600
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311600
signaturepermissions-required
https://vuldb.com/?submit.591420
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

yhryhryhr_tutu (VulDB User)
.
CVE-2025-5854 : Buffer Overflow in Tenda AC6 Routers