VulnerabilityPublished 16 Oct 2025

CVE-2024-42192: HCL Software Traveler for Microsoft Outlook · Insufficiently Protected Credentials

Affects HCL Software Traveler for Microsoft OutlookSource CVE Database V5

Not known to be exploited · CVSS 5.5 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

5.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
HCL Software Traveler for Microsoft Outlook	Affected =3.0.14	Fixed in–

AI-suggested

Monitor HCL Software advisories closely and apply security patches or updates as soon as they become available for Traveler for Microsoft Outlook version 3.0.14.
Restrict local access to systems running the vulnerable software by enforcing strict access controls and least privilege principles to minimize the risk of local exploitation.
Implement endpoint detection and response (EDR) solutions to monitor for suspicious activities related to credential access or extraction.
Use multi-factor authentication (MFA) for all accounts that could be accessed using leaked credentials to reduce the impact of credential compromise.
Regularly audit and rotate credentials used by Traveler for Microsoft Outlook to limit the window of exposure.
Educate IT staff and users about the risks of credential leakage and enforce secure handling of authentication data.
Consider network segmentation to isolate systems running vulnerable software from critical infrastructure to contain potential breaches.
Employ credential vaulting solutions where possible to reduce reliance on stored plaintext or weakly protected credentials within applications.

Description

HCL Traveler for Microsoft Outlook (HTMO) is susceptible to a credential leakage which could allow an attacker to access other computers or applications.

Impact

For European organizations, the primary impact of CVE-2024-42192 is the potential compromise of sensitive credentials used within corporate environments. This could lead to unauthorized access to internal systems, data breaches, and lateral movement by attackers once credentials are leaked. The confidentiality of user credentials is at risk, which could undermine trust in enterprise communication and collaboration platforms. Organizations with extensive use of HCL Traveler for Microsoft Outlook, especially in sectors like finance, government, and critical infrastructure, may face increased risk of espionage or data theft. The vulnerability does not directly affect system availability or data integrity, but the indirect consequences of credential compromise can be severe, including regulatory penalties under GDPR if personal data is exposed. The medium severity rating suggests that while the threat is not immediately critical, it requires timely remediation to prevent escalation. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for future attacks, especially from sophisticated threat actors targeting European enterprises.

CWE-522Insufficiently Protected Credentials (opens in a new tab)
Class weaknessOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
Architecture and Design
Use an appropriate security mechanism to protect the credentials.
Architecture and Design
Make appropriate use of cryptography to protect the credentials.
Implementation
Use industry standards to protect the credentials (e.g. LDAP, keystore, etc.).
OWASP Cheat Sheets
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V2.10.3 (opens in a new tab)
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
Attack patterns
Session Sidejacking (opens in a new tab)
Signature Spoofing by Key Theft (opens in a new tab)
Password Recovery Exploitation (opens in a new tab)
Kerberoasting (opens in a new tab)
Modify Existing Service (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0124066 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Oct 2025, 00:50 UTC

WeaknessesCWE-522

Technical details

References

Community reviews

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