Overview
This report presents a detailed analysis of a significant security vulnerability, CVE-2025-46035, which affects Tenda AC6 v.15.03.05.16. The vulnerability is of high importance due to its potential to permit a remote attacker to cause a denial of service and possibly compromise the system or leak data.
Vulnerability Summary
CVE ID: CVE-2025-46035
Severity: High (7.5 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of service, potential system compromise, and data leakage
Affected Products
Escape the Surveillance Era
Most apps won’t tell you the truth.
They’re part of the problem.
Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.
Ameeba Chat gives you a way out.
- • No phone number
- • No email
- • No personal info
- • Anonymous aliases
- • End-to-end encrypted
Chat without a trace.
Product | Affected Versions
Tenda AC6 | v.15.03.05.16
How the Exploit Works
This vulnerability stems from a buffer overflow issue in the handling of the schedStartTime and schedEndTime parameters in an unauthenticated HTTP GET request to the /goform/openSchedWifi endpoint in Tenda AC6 v.15.03.05.16. An attacker can send an oversized schedStartTime and schedEndTime parameters to this endpoint, which causes the system to overflow its buffer, leading to a denial of service. Depending on the system configuration, the attacker might also gain unauthorized access or cause data leakage.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. The malicious payload here consists of oversized schedStartTime and schedEndTime parameters.
GET /goform/openSchedWifi?schedStartTime=OVERSIZED_VALUE&schedEndTime=OVERSIZED_VALUE HTTP/1.1
Host: target.example.comNote: Replace `OVERSIZED_VALUE` with values exceeding the expected size for the schedStartTime and schedEndTime parameters.
Mitigation Guidance
It is recommended to apply the vendor patch as soon as it is available to prevent potential attacks. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure.
