Hubbell Aclara Metrum Cellular Web Interface
All CISA Advisories, CISA, June 23, 2026
Summary
Successful exploitation of this vulnerability could allow attackers to manipulate critical device settings and repeatedly disrupt operations, potentially causing a loss of communications to the device.
The following versions of Hubbell Aclara Metrum Cellular Web Interface are affected:
- Aclara Metrum Cellular Web Interface
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 7.5 | Hubbell | Hubbell Aclara Metrum Cellular Web Interface | Missing Authentication for Critical Function |
Background
- Critical Infrastructure Sectors: Energy
- Countries/Areas Deployed: United States
- Company Headquarters Location: United States
Vulnerabilities
CVE-2026-1840
The Aclara Metrum Cellular Web Interface is vulnerable to unauthorized access due to the absence of authentication controls on critical system functions. This weakness exposes essential configuration settings, allowing attackers to alter operational parameters and trigger system restarts without restriction. Such unauthorized changes can disrupt normal functionality and, if performed repeatedly, may lead to a loss of communications to the device.
Affected Products
Hubbell Aclara Metrum Cellular Web Interface
Hubbell
Hubbell Aclara Metrum Cellular Web Interface: <v2.1.0.105
known_affected
Remediations
Mitigation
Hubbell encourages users to update their firmware to v2.1.0.105 in order to minimize network exposure and ensure that devices are not accessible from the Internet. Users can download version 2.1.0.105 from: https://aclara.my.site.com/AclaraConnect/s/
Relevant CWE: CWE-306 Missing Authentication for Critical Function
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 4.0 | 8.7 | HIGH | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
Acknowledgments
- Abhirup Konwar reported this vulnerability to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.
Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
Locate control system networks and remote devices behind firewalls and isolating them from business networks.
When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
Revision History
- Initial Release Date: 2026-06-23
| Date | Revision | Summary |
|---|---|---|
| 2026-06-23 | 1 | Initial Publication |
