CVE-2026-1840

HIGH 7.5

Missing authentication for critical function in Hubbell Aclara Metrum Cellular Web Interface

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	hubbell
Product	aclara metrum cellular web interface
Published	Jun 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Hubbell / Aclara Metrum Cellular Web Interface

0 < 2.1.0.105

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-174-07 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-174-07.json aclara.my.site.com: https://aclara.my.site.com/AclaraConnect/s/

Credits

🔍 Abhirup Konwar