Stack-Based Buffer Overflow in Tenda AC18 Router
CVE-2025-11123

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac18
Vendor
CVE Published:
28 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-11123?

A security flaw exists in the Tenda AC18 router, specifically in the '/goform/saveAutoQos' function, which can be exploited to trigger a stack-based buffer overflow. This vulnerability allows an attacker to manipulate the 'enable' argument, potentially leading to unauthorized access and control of the device. The attack can be executed remotely, making it essential for users to apply necessary security measures and updates to mitigate threats.

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Affected Version(s)

AC18 15.03.05.19

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-2025-11123 - Proof of Concept

References

https://vuldb.com/?id.326204
vdb-entrytechnical-description
https://vuldb.com/?ctiid.326204
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https://vuldb.com/?submit.664197
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)
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