# HCL Software Traveler for Microsoft Outlook vulnerabilities

Source: https://junglewise.ai/threats/technologies/traveler-for-microsoft-outlook  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/traveler-for-microsoft-outlook.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in HCL Software Traveler for Microsoft Outlook: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-21770, was published on 17 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (0 critical, 0 exploited in the wild)

## About HCL Software Traveler for Microsoft Outlook

An add-in for Microsoft Outlook that enables synchronization of mail, calendar, and contacts with HCL Domino servers.

## Latest HCL Software Traveler for Microsoft Outlook vulnerabilities

- [CVE-2026-21770: HCL Traveler for Microsoft Outlook DLL hijacking](https://junglewise.ai/threats/cve-2026-21770-hcl-traveler-for-microsoft-outlook-dll-hijacking) (medium, CVSS 6.5, published 17 Jul 2026)
- [CVE-2023-37524: HCL Traveler for Microsoft Outlook use of unmaintained .NET Framework 4.5](https://junglewise.ai/threats/cve-2023-37524-hcl-traveler-for-microsoft-outlook-use-of-unmaintained-net) (high, CVSS 7.7, published 27 Jun 2026)
- [CVE-2024-23581: HCL Traveler for Microsoft Outlook use of unmaintained components](https://junglewise.ai/threats/cve-2024-23581-hcl-traveler-for-microsoft-outlook-use-of-unmaintained-components) (medium, CVSS 6.7, published 26 Jun 2026)

## Most severe HCL Software Traveler for Microsoft Outlook vulnerabilities

- [CVE-2023-37524: HCL Traveler for Microsoft Outlook use of unmaintained .NET Framework 4.5](https://junglewise.ai/threats/cve-2023-37524-hcl-traveler-for-microsoft-outlook-use-of-unmaintained-net) (high, CVSS 7.7, published 27 Jun 2026)
- [CVE-2024-23581: HCL Traveler for Microsoft Outlook use of unmaintained components](https://junglewise.ai/threats/cve-2024-23581-hcl-traveler-for-microsoft-outlook-use-of-unmaintained-components) (medium, CVSS 6.7, published 26 Jun 2026)
- [CVE-2026-21770: HCL Traveler for Microsoft Outlook DLL hijacking](https://junglewise.ai/threats/cve-2026-21770-hcl-traveler-for-microsoft-outlook-dll-hijacking) (medium, CVSS 6.5, published 17 Jul 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other HCL Software technologies

- [HCL Software Aftermarket EPC](https://junglewise.ai/threats/technologies/aftermarket-epc): 15 vulnerabilities
- [HCL Software DFXAnalytics](https://junglewise.ai/threats/technologies/dfxanalytics): 10 vulnerabilities
- [HCL Software MyCloud](https://junglewise.ai/threats/technologies/mycloud): 7 vulnerabilities
- [HCL Software DFXServer](https://junglewise.ai/threats/technologies/dfxserver): 5 vulnerabilities
- [HCL Software DevOps Deploy](https://junglewise.ai/threats/technologies/devops-deploy): 4 vulnerabilities
- [HCL Software DevOps Launch](https://junglewise.ai/threats/technologies/devops-launch): 3 vulnerabilities
- [HCL Software IntelliOps Event Management](https://junglewise.ai/threats/technologies/intelliops-event-management): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "HCL Software Traveler for Microsoft Outlook vulnerabilities", https://junglewise.ai/threats/technologies/traveler-for-microsoft-outlook, 9 November 2026.