Buffer Overflow Vulnerability in Tenda AC8 Embedded Httpd Service
CVE-2026-2203

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac8
Vendor
CVE Published:
9 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2203?

A vulnerability exists in the Tenda AC8 router's Embedded Httpd Service, specifically within the /goform/fast_setting_wifi_set function. This flaw arises when manipulating the 'timeZone' argument, leading to a buffer overflow. Such a vulnerability can allow remote attackers to exploit the flaw, potentially allowing them to execute malicious code or disrupt the service. Recommendations for mitigation include updating to patched versions and enhancing security measures to prevent unauthorized access.

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Affected Version(s)

AC8 16.03.33.05

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-2026-2203 - Proof of Concept

References

https://vuldb.com/?id.344906
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344906
signaturepermissions-required
https://vuldb.com/?submit.750226
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

sunnyyaya (VulDB User)
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