Stack-Based Buffer Overflow in Tenda AC18 Router
CVE-2025-11326

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac18
Vendor
CVE Published:
6 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-11326?

A weakness has been discovered in the Tenda AC18 router, specifically within the /goform/WifiMacFilterSet functionality. The vulnerability arises from improper handling of the wifi_chkHz argument, which can lead to stack-based buffer overflow. This flaw allows remote attackers to potentially exploit the router without authentication. Given that the exploit code is publicly available, it is crucial for users and administrators to take immediate action to secure their devices against potential attacks.

Affected Version(s)

AC18 15.03.05.19(6318)

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-2025-11326 - Proof of Concept

References

https://vuldb.com/?id.327209
vdb-entrytechnical-description
https://vuldb.com/?ctiid.327209
signaturepermissions-required
https://vuldb.com/?submit.664530
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_tu (VulDB User)
JSON
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CVE-2025-11326 : Stack-Based Buffer Overflow in Tenda AC18 Router