CVE-2020-14268: 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 Notes client (versions 9 and 10) could potentially be exploited by an unauthenticated attacker resulting in a stack buffer overflow. This could allow a remote attacker to crash the client or inject code into the system which would execute with the privileges of the client.

Affected products

• Hcltech Notes: from 9.0, before 9.0.1 (fixed in 9.0.1); from 10.0, before 10.0.1 (fixed in 10.0.1); version 9.0.1 only; version 10.0.1 only

Published 2020-12-14. Last modified 2026-06-17.