CVE-2026-36540_CVE-2026-36540

7.3 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Basic Information

ID CVE-2026-36540

Source mitre

Published May 27, 2026 at 00:00

Modified May 28, 2026 at 13:42

Affected Product

Vendor n/a

Product n/a

Version n/a

Affected Versions n/a n/a n/a

CWE Classification

CWE-77

References

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    "published": "2026-05-27T00:00:00.000Z",
    "modified": "2026-05-28T13:42:54.895Z",
    "type": "cve",
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