CVE-2025-63212: Gatesair Flexiva LX1000 Firmware

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

GatesAir Flexiva-LX devices on firmware 1.0.13 and 2.0, including models LX100, LX300, LX600, and LX1000, expose sensitive session identifiers (sid) in the publicly accessible log file located at /log/Flexiva%20LX.log. An unauthenticated attacker can retrieve valid session IDs and hijack sessions without providing any credentials. This attack requires the legitimate user (admin) to have previously closed the browser window without logging out.

Affected products

• Gatesair Flexiva LX1000 Firmware: version 1.0.13 only; version 2.0 only
• Gatesair Flexiva LX100 Firmware: version 1.0.13 only; version 2.0 only
• Gatesair Flexiva LX300 Firmware: version 1.0.13 only; version 2.0 only
• Gatesair Flexiva LX600 Firmware: version 1.0.13 only; version 2.0 only

Published 2025-11-19. Last modified 2026-06-17.