CVE-2026-21770: Hclsoftware Hcl Traveler For Microsoft Outlook Htmo

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

HCL Traveler for Microsoft Outlook (HTMO) is susceptible to a DLL hijacking vulnerability which could allow an attacker to modify or replace the application with malicious content.

Affected products

• Hclsoftware Hcl Traveler For Microsoft Outlook Htmo: before 3.0.16 (fixed in 3.0.16)

Published 2026-07-17. Last modified 2026-07-17.