High severity · published Jun 26, 2026
CVE-2024-23581
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to an application modification vulnerability
7.8
CVSS
0.1%
EPSS
No
On KEV
Description
The HCL Traveler for Microsoft Outlook libraries are being flagged as potentially malicious software or an unrecognized application.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 0% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TF
Traveler for Microsoft Outlook · HCLSoftware
< 3.0.9 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-23581
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-23581
Vendor Advisory
https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0131417
More from Traveler for Microsoft Outlook
7.8
CVE-2023-37524
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to vulnerabilities due to .NET Framework 4.5 being out of service
5.5
CVE-2025-59868
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to sensitive data exposure