CVE-2026-36540
- State
- Published
- Severity
- 7.3 High
- Published
- May 27, 2026
- Updated
- Jul 5, 2026
- Reserved
- Apr 6, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | CISA-ADP |
Weaknesses
- CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
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