CVE-2020-14224: Hcltech Notes

Critical severity, CVSS 9.8. EPSS: 2.3% chance of exploitation in the next 30 days.

A vulnerability in the MIME message handling of the HCL Notes v9 client could potentially be exploited by an unauthenticated attacker resulting in a stack buffer overflow. This could allow a remote attacker to crash the Notes application or inject code into the system which would execute with the privileges of the currently logged-in user.

Affected products

• Hcltech Notes: version 9.0 only; version 9.0.1 only

Published 2020-12-18. Last modified 2026-06-17.