PatchSiren cyber security CVE debrief
CVE-2026-11503 Tenda CVE debrief
CVE-2026-11503 is a HIGH severity vulnerability in Tenda CX12L 16.03.53.12. The Wi-Fi Configuration Endpoint is affected by a stack-based buffer overflow via ssid argument manipulation in the form_fast_setting_wifi_set function of /goform/fast_setting_wifi_set. Remote attackers can exploit this vulnerability. The exploit has been publicly disclosed.
- Vendor
- Tenda
- Product
- CX12L
- CVSS
- HIGH 7.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-08
- Original CVE updated
- 2026-06-08
- Advisory published
- 2026-06-08
- Advisory updated
- 2026-06-08
Who should care
Users of Tenda CX12L 16.03.53.12 should apply patches or mitigations to prevent exploitation.
Technical summary
The vulnerability exists in the form_fast_setting_wifi_set function of /goform/fast_setting_wifi_set in Tenda CX12L 16.03.53.12. A stack-based buffer overflow occurs when the ssid argument is manipulated. This allows remote attackers to launch an exploit, which has been publicly disclosed.
Defensive priority
HIGH
Recommended defensive actions
- Apply patches or updates provided by the vendor.
- Implement network segmentation and isolation to limit the attack surface.
- Monitor network traffic and system logs for suspicious activity.
Evidence notes
The CVE-2026-11503 vulnerability has been detected in Tenda CX12L 16.03.53.12. The CVSS score is 7.4, indicating a HIGH severity level.
Official resources
CVE-2026-11503 was published on 2026-06-08T10:16:32.927Z and modified on 2026-06-08T14:57:14.757Z.