Local compromise via unsupported .NET Framework dependency
Published Jun 27, 2026 · Updated Jun 27, 2026
Unmaintained component use in HCL Traveler for Microsoft Outlook before 3.0.6 exposes local users to known .NET Framework 4.5 flaws. HTMO depends on the out-of-support .NET Framework 4.5 runtime, which no longer receives security updates; HCL has not identified the inherited flaws or affected code paths. Exploitation requires local access and user interaction, and the record identifies potential confidentiality, integrity, and availability compromise without specifying a concrete outcome.
Summary
What happened
Unmaintained component use in HCL Traveler for Microsoft Outlook before 3.0.6 exposes local users to known .NET Framework 4.5 flaws. HTMO depends on the out-of-support .NET Framework 4.5 runtime, which no longer receives security updates; HCL has not identified the inherited flaws or affected code paths. Exploitation requires local access and user interaction, and the record identifies potential confidentiality, integrity, and availability compromise without specifying a concrete outcome.
The record
- CVE
- CVE-2023-37524
- Published
- Jun 27, 2026
- Updated
- Jun 27, 2026
- Vendor
- HCLSoftware
- Product
- HCL Traveler for Microsoft Outlook
- Classifications
- CWE-1104, T1204
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 27, 2026CVE publishedPublication date reported by the CVE source.
- Jun 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=<3.0.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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