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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
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11503 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11503

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11503 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11503

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.