Buffer Overflow Vulnerability in Tenda HG10's Boa Web Server
CVE-2026-86166

8.7HIGH

Key Information:

Vendor

Tenda
Status
Hg10
Vendor
CVE Published:
6 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86166?

A vulnerability exists in the Tenda HG10 device due to improper handling of arguments in the Boa Web Server component. Specifically, the function formWanRedirect can be manipulated, leading to a buffer overflow condition. This exploit could be executed remotely, allowing an attacker to potentially compromise the integrity of the device. As details of this vulnerability have been publicly disclosed, it is crucial for users to evaluate their systems and apply necessary mitigations to safeguard against potential exploitation.

Affected Version(s)

HG10 300001138

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-2026-86166 - Proof of Concept

References

https://vuldb.com/vuln/399305
vdb-entrytechnical-description
https://vuldb.com/vuln/399305/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86166
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)
.