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CVE-2026-3356— Missing Authentication for Critical Function vulnerability in Anritsu Remote Spectrum Monitor

Quick assessment

Affected
Anritsu Remote Spectrum Monitor MS27100A
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Anritsu Remote Spectrum Monitor MS27100A是日本Anritsu公司的一款支持远程频谱监测与无线信号分析的监控设备。 Anritsu Remote Spectrum Monitor MS27100A存在访问控制错误漏洞，该漏洞源于设备未提供启用或配置身份验证的机制，可能导致身份验证绕过。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.58% · P46

Possible ATT&CK Techniques 1 AI

T1078.001 · Default Accounts
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I. Basic Information for CVE-2026-3356

Vulnerability Information
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Vulnerability Title
Missing Authentication for Critical Function vulnerability in Anritsu Remote Spectrum Monitor
Source: CVE Program / CVE List V5
Vulnerability Description
The MS27102A Remote Spectrum Monitor is vulnerable to an authentication bypass that allows unauthorized users to access and manipulate its management interface. Because the device provides no mechanism to enable or configure authentication, the issue is inherent to its design rather than a deployment error.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Anritsu Remote Spectrum Monitor MS27100A 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Anritsu Remote Spectrum Monitor MS27100A是日本Anritsu公司的一款支持远程频谱监测与无线信号分析的监控设备。 Anritsu Remote Spectrum Monitor MS27100A存在访问控制错误漏洞，该漏洞源于设备未提供启用或配置身份验证的机制，可能导致身份验证绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Anritsu Remote Spectrum Monitor MS27100A All versions -
Anritsu Remote Spectrum Monitor MS27101A All versions -
Anritsu Remote Spectrum Monitor MS27102A All versions -
Anritsu Remote Spectrum Monitor MS27103A All versions -

II. Public POCs for CVE-2026-3356

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III. Intelligence Information for CVE-2026-3356

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Vendor Advisories for CVE-2026-3356 (1)

IV. Related Vulnerabilities

Same vendor: Anritsu
Same weakness: CWE-306

V. Comments for CVE-2026-3356

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