Stack-Based Buffer Overflow in Tenda AC5 WiFi Handler
CVE-2026-105778

9.4CRITICAL

Key Information:

Vendor

Tenda
Status
Ac5
Vendor
CVE Published:
6 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-105778?

A vulnerability has been identified in the Tenda AC5 router, specifically within the Wifi Handler component at the /goform/setWifi endpoint. This flaw allows for manipulation of the wifiPwd argument, potentially leading to a stack-based buffer overflow. The exploitation of this vulnerability can be executed remotely, making it a concern for users of affected devices. The exploit has been publicly disclosed, highlighting the urgency for users to apply any available security patches or take preventive measures.

Affected Version(s)

AC5 02.03.01.111_multi

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-2026-105778 - Proof of Concept

References

https://vuldb.com/vuln/413811
vdb-entrytechnical-description
https://vuldb.com/vuln/413811/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-105778
third-party-advisory

CVSS V4

Score:
9.4
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

raisecnull (VulDB User)
.