CVE-2026-1840 Missing authentication for critical function in Hubbell Aclara Metrum Cellular Web Interface
Attackers can modify configuration settings and restart the device without authentication, potentially disrupting communications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1840?
CVE-2026-1840 is a high-severity missing authorization vulnerability in Hubbell Aclara Metrum Cellular Web Interface, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-1840?
How do I fix CVE-2026-1840?
No fix has been published for CVE-2026-1840 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1840 being exploited?
There is no known exploitation of CVE-2026-1840 in the wild and no public exploit code.
Sources
Also known as GHSA-gx8p-xc64-fg2f.