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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Fixes
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Workaround
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References
History
Wed, 27 May 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-05-27T13:17:20.373Z
Reserved: 2026-04-06T00:00:00.000Z
Link: CVE-2026-36540
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-05-27T14:16:45.637
Modified: 2026-05-27T14:16:45.637
Link: CVE-2026-36540
Redhat
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OpenCVE Enrichment
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Weaknesses
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