Stack-based Buffer Overflow in Tenda A18 Pro Router
CVE-2026-4492

8.7HIGH

Key Information:

Vendor

Tenda
Status
A18 Pro
Vendor
CVE Published:
20 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4492?

A stack-based buffer overflow vulnerability exists in the Tenda A18 Pro router within the function set_qosMib_list of the /goform/formSetQosBand file. This flaw allows remote attackers to manipulate the argument list, potentially leading to arbitrary code execution. The exploit has been publicly disclosed, making systems running the affected version susceptible to attacks. Immediate remediation is necessary to safeguard against potential exploitation.

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Deploy the Patch

Affected Version(s)

A18 Pro 02.03.02.28

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-2026-4492 - Proof of Concept

References

https://vuldb.com/?id.352018
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352018
signaturepermissions-required
https://vuldb.com/?submit.773682
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

lilukun (VulDB User)
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