CVE-2026-36540

7.3 HIGH

Netis AC1200 Router NC21 V4.0.1.4296 is vulnerable to unauthenticated command injection via the /cgi-bin/skk_set.cgi endpoint

Published: 2026-05-27 · Last updated: 2026-05-28

Severity and scoring

CVSS: 7.3 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE: CWE-77

Description

Netis AC1200 Router NC21 V4.0.1.4296 is vulnerable to unauthenticated command injection via the /cgi-bin/skk_set.cgi endpoint. The password and new_pwd_confirm POST parameters are passed directly to the underlying OS shell without sanitization. An attacker can inject arbitrary shell commands by wrapping them in backticks (`) and encoding them in base64. Because the endpoint requires no authentication, any device on the LAN can achieve full Remote Code Execution on the router's operating system with a single HTTP POST request.

Source: NVD

References

Related CVEs

Same CWE

CVE-2024-24909 — Dell OpenManage Integration with Microsoft Windows Admin Center contains a Remote Code Execution vulnerability in the gateway plugin (8.8 HIGH)
CVE-2025-56814 — A code injection vulnerability in the wxExecute() function of OpenCPN v5.12.0 allows attackers to execute arbitrary code via embedding sh... (7.8 HIGH)
CVE-2026-12223 — A vulnerability was identified in Yealink SIP-T46U 108.86.0.118 (5.5 MEDIUM)
CVE-2026-12219 — A flaw has been found in Yealink SIP-T46U 108.86.0.118 (6.3 MEDIUM)
CVE-2026-12197 — A security flaw has been discovered in Ruijie EG105G-P 2.340 (7.2 HIGH)