CVE-2026-86300
Received Received - Intake

Improper Authentication in Tenda AC9 Router Firmware

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: VulDB

Description
A flaw has been found in Tenda AC9 15.03.05.14. This impacts the function R7WebsSecurityHandler of the component Web Management. This manipulation causes improper authentication. The attack may be initiated remotely. The exploit has been published and may be used.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-86300
EUVD
EUVD-2026-72351

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
tenda ac9 15.03.05.14
tenda ac9 From 1.0 (inc) to 15.03.05.16 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CVE-2026-86300 is an improper authentication flaw in Tenda AC9 routers (versions V1.0 and V15.03.05.14/V15.03.05.16). The vulnerability exists in the R7WebsSecurityHandler function of the Web Management component. Attackers can remotely exploit this by sending crafted HTTP requests to specific endpoints, bypassing authentication checks. The flaw allows unauthenticated access to sensitive router information or administrative functions.

Detection Guidance

To detect CVE-2026-86300 on your Tenda AC9 router, check if unauthenticated requests to these endpoints return sensitive data: GET /goform/getProduct, /goform/getWanConnectStatus, or /goform/getRebootStatus. Use curl commands like: curl http://<router-ip>/goform/getProduct. If JSON responses appear without authentication, the device is vulnerable.

Impact Analysis

This vulnerability allows attackers to remotely access sensitive router data without authentication, including product details, WAN connection status, or reboot status. It also enables unauthenticated password changes, granting full administrative control over the router. Attackers could intercept traffic, modify settings, or install malicious firmware.

  • Unauthenticated access to router information (e.g., product code, connection status).
  • Ability to change admin password without authentication, taking full control of the device.
Compliance Impact

This vulnerability could lead to non-compliance with data protection regulations like GDPR or HIPAA if exploited to access or exfiltrate sensitive network traffic or device information. Unauthorized access to router data may violate confidentiality requirements, while lack of authentication controls undermines security measures mandated by these standards.

Mitigation Strategies

Immediately update the router firmware to the latest version from Tenda's official website. Disable remote administration if enabled. Block external access to the router's web interface via firewall rules. Monitor network traffic for suspicious requests to the vulnerable endpoints (/goform/getProduct, /goform/fast_setting_wifi_set).

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-86300. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart