CVE-2026-22877: Copeland Xweb 300d Pro Firmware

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

An arbitrary file-read vulnerability exists in XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to read arbitrary files on the system, and potentially causing a denial-of-service attack.

Affected products

• Copeland Xweb 300d Pro Firmware: up to and including 1.12.1
• Copeland Xweb 500b Pro Firmware: up to and including 1.12.1
• Copeland Xweb 500d Pro Firmware: up to and including 1.12.1

Published 2026-02-27. Last modified 2026-06-17.