CVE-2020-4126: Hcltech Hcl Inotes

Medium severity, CVSS 5.9. EPSS: 0.7% chance of exploitation in the next 30 days.

HCL iNotes is susceptible to a sensitive cookie exposure vulnerability. This can allow an unauthenticated remote attacker to capture the cookie by intercepting its transmission within an http session. Fixes are available in HCL Domino and iNotes versions 10.0.1 FP6 and 11.0.1 FP2 and later.

Affected products

• Hcltech Hcl Inotes: from 9.0, before 10.0.1 (fixed in 10.0.1); from 11.0.0, before 11.0.1 (fixed in 11.0.1); version 10.0.1 only; version 11.0.1 only

Published 2020-12-01. Last modified 2026-06-17.