Is CVE-2026-1840 actively exploited?

No active exploitation of CVE-2026-1840 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-1840 be exploited remotely?

Yes. CVE-2026-1840 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-1840?

CVE-2026-1840 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-1840

HIGH

CVE-2026-1840

CWE-306Published: June 24, 2026· Updated: Jun 25, 2026

7.5

CVSS v3.1

EPSS:0.73%probability of exploitation in 30 daysPercentile:49.4th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-1840 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

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News & Research Mentioning CVE-2026-1840

Hubbell Aclara Metrum Cellular Web Interface

CISA Alerts· Jun 23, 2026

View CSAF 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 Expand All + CVE-2026-1840 The Aclara Metrum Cellular Web Interface is vulnerable to unauthorized access due to the absence [xlite_meta score:73 src:CISA Alerts xlite_fp:8fd8d4aa5ce21c2f10febed7c8adfd1021308b1510f6c4a42edb03472cc36091]