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.
Published: 2026-05-27
Score: 7.3 High
EPSS: 1.5% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 30 May 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Netis
Netis ac1200 Router
Vendors & Products Netis
Netis ac1200 Router

Thu, 28 May 2026 18:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated Command Injection via skk_set.cgi in Netis AC1200 Router NC21

Thu, 28 May 2026 17:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated Remote Command Injection via /cgi-bin/skk_set.cgi on Netis AC1200 Router
Weaknesses CWE-78

Thu, 28 May 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-77
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 27 May 2026 19:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated Remote Command Injection via /cgi-bin/skk_set.cgi on Netis AC1200 Router
Weaknesses CWE-78

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.
References

Subscriptions

Netis Ac1200 Router
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-28T13:42:54.895Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-36540

cve-icon Vulnrichment

Updated: 2026-05-28T13:42:38.289Z

cve-icon NVD

Status : Deferred

Published: 2026-05-27T14:16:45.637

Modified: 2026-06-17T10:41:08.553

Link: CVE-2026-36540

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-30T21:22:37Z

Weaknesses