Stack-based Buffer Overflow Vulnerability in Tenda A15 by Tenda
CVE-2026-4567

9.3CRITICAL

Key Information:

Vendor

Tenda
Status
A15
Vendor
CVE Published:
23 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4567?

A vulnerability has been identified in the Tenda A15 router, specifically in the function UploadCfg located at /cgi-bin/UploadCfg. The flaw arises from improper handling of the File argument, which can lead to a stack-based buffer overflow. This vulnerability allows for remote exploitation, posing a significant risk to network security. Since its disclosure, the exploit has been made publicly available, which emphasizes the importance of immediate remediation actions by users.

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Affected Version(s)

A15 15.13.07.13

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-2026-4567 - Proof of Concept

References

https://vuldb.com/?id.352404
vdb-entrytechnical-description
https://vuldb.com/?ctiid.352404
signaturepermissions-required
https://vuldb.com/?submit.775156
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
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

942384053 (VulDB User)
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