CVE-2026-21770
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to DLL hijacking
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to DLL hijacking
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.
- Record
CVE-2026-21770- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-427
- Updated
- 2026-11-02
EUVDEUVD-2026-45141
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.
- Record
EUVD-2026-45141- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7vgx-3mff-rjp8
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to a DLL hijacking vulnerability which...
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.
- Record
GHSA-7vgx-3mff-rjp8- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-427
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-21770- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-427
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-21770 is a medium vulnerability (CVSS 6.5) in Hcl Software Traveler For Microsoft Outlook (htmo), published July 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 5th percentile. No source names a fixed version.