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PatchSiren cyber security CVE debrief

CVE-2026-1840 Hubbell CVE debrief

The Hubbell Aclara Metrum Cellular Web Interface is vulnerable to unauthorized access due to a lack of authentication controls on critical system functions. This weakness allows attackers to alter operational parameters and trigger system restarts without restriction, potentially disrupting normal functionality and leading to a loss of communications to the device. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Hubbell encourages users to update their firmware to v2.1.0.105 to minimize network exposure. The vulnerability was publicly disclosed on June 23, 2026.

Vendor
Hubbell
Product
Aclara Metrum Cellular Web Interface
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-23
Original CVE updated
2026-06-23
Advisory published
2026-06-23
Advisory updated
2026-06-23

Who should care

Organizations using the Hubbell Aclara Metrum Cellular Web Interface should prioritize patching this vulnerability to prevent potential disruptions to their operations. Additionally, security teams and IT administrators responsible for industrial control systems should be aware of this vulnerability and take steps to mitigate its impact.

Technical summary

The Aclara Metrum Cellular Web Interface lacks authentication controls on critical system functions, allowing unauthorized access and potential disruptions to normal functionality. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. The affected product is Hubbell Aclara Metrum Cellular Web Interface: <v2.1.0.105. Hubbell encourages users to update their firmware to v2.1.0.105 to minimize network exposure and ensure that devices are not accessible from the Internet.

Defensive priority

Patching this vulnerability is a high priority due to its potential impact on operational functionality and the high severity of the vulnerability. Organizations should update their firmware to v2.1.0.105 as soon as possible.

Recommended defensive actions

  • Update firmware to v2.1.0.105
  • Minimize network exposure to prevent unauthorized access
  • Ensure devices are not accessible from the Internet
  • Monitor system functionality for potential disruptions
  • Implement additional security controls to detect and prevent exploitation

Evidence notes

The vulnerability was publicly disclosed on June 23, 2026, and has a CVSS score of 7.5. The affected product is Hubbell Aclara Metrum Cellular Web Interface: <v2.1.0.105. Hubbell encourages users to update their firmware to v2.1.0.105 to minimize network exposure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-1840 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-1840

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-1840 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-1840

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-174-07.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-174-07

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.