Anritsu Remote Spectrum Monitor Vulnerability Advisory
Anritsu Remote Spectrum Monitor Vulnerability Advisory
🚨 Attention: A critical vulnerability has been identified in the Anritsu Remote Spectrum Monitor that could allow attackers with network access to alter operational settings, obtain sensitive signal data, or disrupt device availability.
Affected Sectors
The affected Critical Infrastructure Sectors include:
- Communications
- Defense Industrial Base
- Emergency Services
- Transportation Systems
Vulnerability Details
The MS27102A Remote Spectrum Monitor is vulnerable to an authentication bypass, allowing unauthorized users to access and manipulate its management interface. This issue is inherent to its design, as the device provides no mechanism to enable or configure authentication. The relevant CWE is CWE-306: Missing Authentication for Critical Function. This vulnerability was reported to CISA by Souvik Kandar.
Affected Versions
The following versions of the Anritsu Remote Spectrum Monitor are affected:
- Remote Spectrum Monitor MS27100A vers:all/* (CVE-2026-3356)
- Remote Spectrum Monitor MS27101A vers:all/* (CVE-2026-3356)
- Remote Spectrum Monitor MS27102A vers:all/* (CVE-2026-3356)
- Remote Spectrum Monitor MS27103A vers:all/* (CVE-2026-3356)
Recommendations
Anritsu has no plans to fix this issue. They recommend that users deploy the Remote Spectrum Monitor within secure network environments to mitigate potential risks. CISA advises users to take defensive measures to minimize the risk of exploitation:
- Minimize network exposure for all control system devices.
- Ensure devices are not accessible from the Internet.
- Use firewalls to isolate control system networks from business networks.
- When remote access is required, utilize secure methods such as Virtual Private Networks (VPNs).
CISA also emphasizes the importance of performing proper impact analysis and risk assessment prior to deploying defensive measures. For more information, visit the CISA ICS webpage.
Conclusion
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. The initial release date for this advisory was March 31, 2026.
For further details, read the complete article here.