CVE-2023-37524
Received Received - Intake
HCL Traveler for Microsoft Outlook .NET Framework 4.5 End-of-Life Vulnerabilities

Publication date: 2026-06-27

Last updated on: 2026-06-27

Assigner: HCL Software

Description
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to vulnerabilities due to .NET Framework 4.5 being out of service.  Since .NET Framework 4.5 has reached end-of-life and no longer receives security updates, it may expose the application to publicly known security weaknesses through vulnerable third-party components.
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Meta Information
Published
2026-06-27
Last Modified
2026-06-27
Generated
2026-06-27
AI Q&A
2026-06-27
EPSS Evaluated
N/A
NVD
CVE-2023-37524
EUVD
EUVD-2023-60599
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
hcl traveler_for_microsoft_outlook to 4.5 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-1104 The product relies on third-party components that are not actively supported or maintained by the original developer or a trusted proxy for the original developer.
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Executive Summary

HCL Traveler for Microsoft Outlook (HTMO) is vulnerable because it relies on the .NET Framework 4.5, which has reached its end-of-life and no longer receives security updates.

This lack of updates means that HTMO may be exposed to publicly known security weaknesses present in the .NET Framework 4.5 and its third-party components.

Impact Analysis

The vulnerability can lead to serious security impacts including high confidentiality, integrity, and availability risks.

  • An attacker with local access and high attack complexity could exploit the vulnerability.
  • Successful exploitation could result in complete compromise of the affected system's data and operations.
Mitigation Strategies

HCL Traveler for Microsoft Outlook is vulnerable due to the use of .NET Framework 4.5, which is out of service and no longer receives security updates. To mitigate this vulnerability, the immediate step is to upgrade or migrate from .NET Framework 4.5 to a supported and updated version of the .NET Framework that receives security patches.

Since the vulnerability arises from publicly known security weaknesses in third-party components within .NET Framework 4.5, ensuring that your environment no longer relies on this outdated framework is critical to reducing exposure.

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