Stack-Based Buffer Overflow in Tenda A18 Httpd Service
CVE-2026-2930

5.3MEDIUM

Key Information:

Vendor

Tenda
Status
A18
Vendor
CVE Published:
22 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2930?

A stack-based buffer overflow vulnerability has been identified in Tenda A18, specifically within the webCgiGetUploadFile function of the /cgi-bin/UploadCfg. This flaw allows for manipulation of the argument boundary, potentially leading to remote code execution if exploited. It is critical for users of the affected version to be aware of this risk, as the exploit is publicly available.

Affected Version(s)

A18 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-2026-2930 - Proof of Concept

References

https://vuldb.com/?id.347277
vdb-entrytechnical-description
https://vuldb.com/?ctiid.347277
signaturepermissions-required
https://vuldb.com/?submit.755227
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

Liyu Zhu (VulDB User)
.