How severe is CVE-2023-37524?

CVE-2023-37524 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-37524 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-37524?

CVE-2023-37524 affects Hcltech Traveler For Microsoft Outlook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-37524?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-37524 published?

CVE-2023-37524 was published on 2026-06-27 and last updated on 2026-07-06.

CVE-2023-37524

CVE-2023-37524 is a high-severity vulnerability in Hcltech Traveler For Microsoft Outlook with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1104.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1104
Affected product: Hcltech Traveler For Microsoft Outlook
Published: 2026-06-27
Last modified: 2026-07-06

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.

Frequently asked questions

What is CVE-2023-37524?: 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.
How severe is CVE-2023-37524?: CVE-2023-37524 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-37524 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-37524?: CVE-2023-37524 affects Hcltech Traveler For Microsoft Outlook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-37524?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-37524 published?: CVE-2023-37524 was published on 2026-06-27 and last updated on 2026-07-06.

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0131418

Affected products (1)

cpe:2.3:a:hcltech:traveler_for_microsoft_outlook:*:*:*:*:*:*:*:*

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