Stack-Based Buffer Overflow in Tenda AC7 Router
CVE-2025-4809

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac7
Vendor
CVE Published:
16 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-4809?

A stack-based buffer overflow vulnerability exists in the Tenda AC7 router, specifically in the fromSafeSetMacFilter function of the /goform/setMacFilterCfg file. This vulnerability arises from improper handling of the deviceList argument, allowing remote attackers to exploit the flaw. Successful exploitation can lead to arbitrary code execution, posing significant risks to the router's integrity and network security. The privilege required for this attack remains low, making it a critical concern for users.

Affected Version(s)

AC7 15.03.06.44

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-2025-4809 - Proof of Concept

References

https://vuldb.com/?id.309264
vdb-entrytechnical-description
https://vuldb.com/?ctiid.309264
signaturepermissions-required
https://vuldb.com/?submit.573642
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_miemie (VulDB User)
.