Review reviewCritical

CVE-2026-3356

Anritsu Remote Spectrum Monitor MS27100A, Remote Spectrum Monitor MS27101A, Remote Spectrum Monitor MS27102A

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.

CVSS: 9.3
EPSS: 0.39%
CISA KEV: Not listed
Published: 2026.04.01

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.39%

Technical severityCVSS 9.3

Vulnerability overview

Affected product and versions

Product: Anritsu Remote Spectrum Monitor MS27100A, Remote Spectrum Monitor MS27101A, Remote Spectrum Monitor MS27102A
Affected versions: >= All versions
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Anritsu Remote Spectrum Monitor MS27100A, Remote Spectrum Monitor MS27101A, Remote Spectrum Monitor MS27102A and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE: CWE-306