Improper Authentication in Tenda AC9 Web Management System
CVE-2026-86300

6.9MEDIUM

Key Information:

Vendor

Tenda
Status
Ac9
Vendor
CVE Published:
7 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86300?

A security flaw has been identified in the Tenda AC9 version 15.03.05.14, specifically in the R7WebsSecurityHandler component of its web management interface. This flaw allows for improper authentication, potentially enabling remote attackers to manipulate access controls. It is essential for users to address this vulnerability to safeguard their devices and networks. The exploit for this flaw is publicly available, increasing the urgency for mitigation.

Affected Version(s)

AC9 15.03.05.14

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-2026-86300 - Proof of Concept

References

https://vuldb.com/vuln/399464
vdb-entrytechnical-description
https://vuldb.com/vuln/399464/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86300
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

sleep (VulDB User)
.