Vulnerability · Published Jun 8, 2026 · Assigned by VulDB

CVE-2026-11503Tenda CX12L Wi-Fi Configuration Endpoint fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in CX12L from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 59.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security vulnerability has been detected in Tenda CX12L 16.03.53.12. The affected element is the function form_fast_setting_wifi_set of the file /goform/fast_setting_wifi_set of the component Wi-Fi Configuration Endpoint. Such manipulation of the argument ssid leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

Affected products (as reported)

Vendor	Product	Versions
Tenda	CX12L	16.03.53.12

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-369123 | Tenda CX12L Wi-Fi Configuration Endpoint fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow vdb-entry, technical-description
VDB-369123 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-11503 | CVE Analysis and Report third-party-advisory
Submit #835648 | Tenda CX12L V16.03.53.12 Stack-based Buffer Overflow third-party-advisory
https://github.com/cve-a/moist/issues/1 exploit, issue-tracking
https://www.tenda.com.cn/ product