CVE-2020-6972: Honeywell Notifier Webserver

Critical severity, CVSS 9.1. EPSS: 1.3% chance of exploitation in the next 30 days.

In Notifier Web Server (NWS) Version 3.50 and earlier, the Honeywell Fire Web Server’s authentication may be bypassed by a capture-replay attack from a web browser.

Affected products

• Honeywell Notifier Webserver: up to and including 3.50

Published 2020-03-24. Last modified 2026-06-17.