CVE-2023-37524: HCL Traveler for Microsoft Outlook (HTMO) is susceptible to vulnerabilities due to .NET Framework 4.5 being ou

Q: How do I fix CVE-2023-37524?

traveler for microsoft outlook: upgrade to 3.0.6. Exact commands for each OS are on this page.

Q: Is CVE-2023-37524 being exploited?

CVE-2023-37524 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-37524 affect?

CVE-2023-37524 affects traveler for microsoft outlook. Severity is high (CVSS 7.7). 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 applica

Q: How urgent is CVE-2023-37524?

Priority 37/100. High severity; On your watchlist

Routine

HIGH 7.7WATCHLISTUPGRADE

CVE-2023-37524 is a high-severity flaw (CVSS 7.7) affecting traveler for microsoft outlook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-1104
Published	2026-06-27
Last modified	2026-07-06

Publisher (CNA): HCL Software · Vendor: hcltech

Last updated 2026-07-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-27 02:16 UTCPublished CVE record published
2026-07-06 17:47 UTCUpdated Record last modified

hcltech traveler for microsoft outlook UPGRADE

Affected: < 3.0.6

Fixed in: 3.0.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy traveler-for-microsoft-outlook || rpm -q traveler-for-microsoft-outlook || traveler-for-microsoft-outlook --version

2. UPGRADE to 3.0.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade traveler-for-microsoft-outlook

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade traveler-for-microsoft-outlook

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-37524?

traveler for microsoft outlook: upgrade to 3.0.6. Exact commands for each OS are on this page.

Is CVE-2023-37524 being exploited?

CVE-2023-37524 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-37524 affect?

CVE-2023-37524 affects traveler for microsoft outlook. Severity is high (CVSS 7.7). 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 applica

How urgent is CVE-2023-37524?

Priority 37/100. High severity; On your watchlist

Software pages

Outlook vulnerabilities · .NET vulnerabilities

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References

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