CVE-2023-36659: Opswat Metadefender Kiosk

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

An issue was discovered in OPSWAT MetaDefender KIOSK 4.6.1.9996. Long inputs were not properly processed, which allows remote attackers to cause a denial of service (loss of communication).

Affected products

• Opswat Metadefender Kiosk: from 4.5.0, up to and including 4.6.1.9996

Published 2023-09-15. Last modified 2026-06-17.