CVE-2026-20801

Severity: medium (CVSS 5.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-03 · updated 2026-08-17
Weakness: CWE-319

Description

Cleartext Transmission of Sensitive Information (CWE-319) in a component used in the Gallagher Hanwha VMS and Gallagher NxWitness VMS integrations allows unprivileged users with local network access to view live video streams. This issue affects all versions of Gallagher NxWitness VMS integration prior to 9.10.017 and Gallagher Hanwha VMS integration prior to 9.10.025.

Affected products

Gallagher Hanwha Vms Integration: before 9.10.025 — fixed in 9.10.025
Gallagher Nx Witness Vms Integration: before 9.10.017 — fixed in 9.10.017

How to fix

Upgrade to a fixed version: Gallagher Hanwha Vms Integration 9.10.025; Gallagher Nx Witness Vms Integration 9.10.017. Check the vendor advisory for mitigations.

References

https://security.gallagher.com/en-NZ/Security-Advisories/CVE-2026-20801

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