CVE-2023-54330: Inbit Messenger

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Inbit Messenger versions 4.6.0 to 4.9.0 contain a remote stack-based buffer overflow vulnerability that allows unauthenticated attackers to execute arbitrary code by sending malformed network packets. Attackers can craft a specially designed payload targeting the messenger's network handler to overwrite the Structured Exception Handler (SEH) and execute shellcode on vulnerable Windows systems.

Affected products

• Inbit Inbit Messenger: from 4.6.0, up to and including 4.9.0

Published 2026-01-13. Last modified 2026-06-17.