Stack-based Buffer Overflow in Tenda AC8 Router's Httpd Service
CVE-2026-3044

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac8
Vendor
CVE Published:
23 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3044?

A critical security vulnerability has been identified in the Tenda AC8 router version 16.03.34.06, specifically within the Httpd Service. The function webCgiGetUploadFile located in the /cgi-bin/UploadCfg file is susceptible to manipulation of the argument boundary, leading to a stack-based buffer overflow. This vulnerability allows attackers to execute remote exploits, posing a significant risk to users of this device. The details of this exploit have been made publicly available, enabling potential abuse by malicious actors.

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Affected Version(s)

AC8 16.03.34.06

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-2026-3044 - Proof of Concept

References

https://vuldb.com/?id.347400
vdb-entrytechnical-description
https://vuldb.com/?ctiid.347400
signaturepermissions-required
https://vuldb.com/?submit.757240
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

942384053 (VulDB User)
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