CVE-2023-37524

Analyzed Analyzed - Analysis Complete

HCL Traveler for Microsoft Outlook .NET Framework 4.5 End-of-Life Vulnerabilities

Publication date: 2026-06-27

Last updated on: 2026-07-06

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-27

Last Modified

2026-07-06

Generated

2026-07-17

AI Q&A

2026-06-27

EPSS Evaluated

2026-07-16

NVD

CVE-2023-37524

EUVD

EUVD-2023-60599

Affected Vendors & Products

Vendor	Product	Version / Range
hcltech	traveler_for_microsoft_outlook	to 3.0.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

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.

Compliance Impact

The vulnerability arises because HCL Traveler for Microsoft Outlook uses .NET Framework 4.5, which is out of service and no longer receives security updates. This situation may expose the application to publicly known security weaknesses.

Such exposure to security weaknesses can potentially lead to unauthorized access, data breaches, or data integrity issues, which in turn could impact compliance with common standards and regulations like GDPR and HIPAA that require protection of sensitive data.

However, the provided information does not explicitly detail the direct impact on compliance with these standards.

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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