CVE-2026-3356 PUBLISHED

Missing Authentication for Critical Function vulnerability in Anritsu Remote Spectrum Monitor

Assigner: icscert
Reserved: 27.02.2026 Published: 31.03.2026 Updated: 01.04.2026

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.

Metrics

CVSS 4.0

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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Anritsu
Product	Remote Spectrum Monitor MS27100A
Versions	Default: unaffected Version All versions is affected

Vendor	Anritsu
Product	Remote Spectrum Monitor MS27101A
Versions	Default: unaffected Version All versions is affected

Vendor	Anritsu
Product	Remote Spectrum Monitor MS27102A
Versions	Default: unaffected Version All versions is affected

Vendor	Anritsu
Product	Remote Spectrum Monitor MS27103A
Versions	Default: unaffected Version All versions is affected

Workarounds

Anritsu has no plans to fix this issue. Anritsu recommends that users deploy Remote Spectrum Monitor within secure network environments to mitigate potential risks.

Users can contact Anritsu Technical Support (1-800-267-4878) for more information.

Credits

Souvik Kandar reporter

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-090-01

Problem Types

CWE-306 Missing authentication for critical function CWE