CVE-2026-104611
CriticalCVSS 9.1Summary
A vulnerability was detected in Tenda AC9 15.03.02.13. Affected is an unknown function of the file /goform/fast_setting_internet_set of the component POST Request Handler. Performing a manipulation of the argument netWanType results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.
Risk Assessment
The risk includes remote code execution or device crash, which could lead to router takeover and network security compromise.
Recommendation
It is recommended to immediately update Tenda AC9 firmware to a patched version and restrict access to the administrative panel to trusted networks only.
Other vulnerabilities in Tenda AC9
See all- CVE-2026-86300High
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.
- CVE-2022-36233Medium
A buffer overflow vulnerability was discovered in the Tenda AC9 router firmware version V15.03.2.13 in the httpd process. The issue occurs in the form_fast_setting_wifi_set function, potentially allowing remote code execution.
- CVE-2021-31627High
A buffer overflow vulnerability was found in Tenda AC9 routers versions V1.0 through V15.03.05.19(6318) and AC9 V3.0 V15.03.06.42_multi. Attackers can exploit the 'index' parameter to execute arbitrary code.
- CVE-2021-31624High
A buffer overflow vulnerability was found in Tenda AC9 routers versions V1.0 through V15.03.05.19(6318) and AC9 V3.0 V15.03.06.42_multi. Attackers can exploit the 'urls' parameter to execute arbitrary code on the device.
Original NVD description (English source)
A vulnerability was detected in Tenda AC9 15.03.02.13. Affected is an unknown function of the file /goform/fast_setting_internet_set of the component POST Request Handler. Performing a manipulation of the argument netWanType results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS