Buffer Overflow Vulnerability in Tenda AC18 Routers
CVE-2025-5609

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac18
Vendor
CVE Published:
4 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5609?

A buffer overflow vulnerability exists in the AdvSetLanip function of the Tenda AC18 router, specifically related to the manipulation of the lanMask argument. This flaw can be exploited remotely, allowing attackers to potentially execute arbitrary code or disrupt services. Given that the exploit has been publicly disclosed, users are strongly advised to update their device firmware to mitigate the risk. For additional insights, visit the vendor's website.

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Affected Version(s)

AC18 15.03.05.05

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-2025-5609 - Proof of Concept

References

https://vuldb.com/?id.311095
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311095
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https://vuldb.com/?submit.588936
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_ (VulDB User)
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