What is CVE-2026-21770?

CVE-2026-21770 is a medium-severity vulnerability in Hclsoftware Hcl Traveler For Microsoft Outlook (Htmo), classified under Uncontrolled Search Path Element. CVSS score: 6.5/10. Published 2026-07-17.

How severe is CVE-2026-21770?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Hclsoftware Hcl Traveler For Microsoft Outlook (Htmo)

CVE-2026-21770

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.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

Affected products

Hclsoftware Hcl Traveler For Microsoft Outlook (Htmo) — versions < 3.0.16

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

psirt@hcl.com

Frequently asked questions

What is CVE-2026-21770?: CVE-2026-21770 is a medium-severity vulnerability in Hclsoftware Hcl Traveler For Microsoft Outlook (Htmo), classified under Uncontrolled Search Path Element. CVSS score: 6.5/10. Published 2026-07-17.
How severe is CVE-2026-21770?: Medium severity. CVSS v3 base score is 6.5 out of 10.