CVE-2021-24030: Facebook Gameroom

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

The fbgames protocol handler registered as part of Facebook Gameroom does not properly quote arguments passed to the executable. That allows a malicious URL to cause code execution. This issue affects versions prior to v1.26.0.

Affected products

• Facebook Gameroom: before 1.26.0 (fixed in 1.26.0)

Published 2021-03-10. Last modified 2026-06-17.