Buffer overflow in Tenda Cx12l
CVE-2026-11503
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Tenda Cx12l — versions 16.03.53.12
Weakness classification (CWE)
References
- github.com/cve-a/moist/issues/1 (issue-tracking, exploit)
- vuldb.com/cve/CVE-2026-11503 (third-party-advisory)
- vuldb.com/submit/835648 (third-party-advisory)
- vuldb.com/vuln/369123 (technical-description, vdb-entry)
- vuldb.com/vuln/369123/cti (signature, permissions-required)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-11503?
- CVE-2026-11503 is a high-severity vulnerability in Tenda Cx12l, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-06-08.
- How severe is CVE-2026-11503?
- High severity. CVSS v3 base score is 8.8 out of 10.