Buffer Overflow Vulnerability in Tenda HG10 Router
CVE-2026-86165

9.3CRITICAL

Key Information:

Vendor

Tenda
Status
Hg10
Vendor
CVE Published:
6 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86165?

A critical buffer overflow vulnerability exists in the Tenda HG10 router, specifically within the formURL function of the /boaform/admin/formURL file. By manipulating the Keywd/urlFQDN argument, an attacker can trigger a buffer overflow remotely. This exploit has been disclosed publicly, raising serious concerns about the router's security. It is crucial for users of this device to remain vigilant and apply necessary security updates to mitigate potential attacks.

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-2026-86165 - Proof of Concept

References

https://vuldb.com/vuln/399304
vdb-entrytechnical-description
https://vuldb.com/vuln/399304/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86165
third-party-advisory

CVSS V4

Score:
9.3
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

sunnyyaya (VulDB User)
.