Detections
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HCL Traveler for Microsoft Outlook < 3.0.16 DLL Hijacking (CVE-2026-21770)

medium Nessus Plugin ID 331333

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Synopsis

An application installed on the remote Windows host is affected by a DLL hijacking vulnerability.

Description

The version of HCL Traveler for Microsoft Outlook (HTMO) installed on the remote host is prior to 3.0.16. It is, therefore, affected by a DLL hijacking vulnerability which could allow an attacker to modify or replace the application with malicious content.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to HCL Traveler for Microsoft Outlook (HTMO) version 3.0.16 or later.

See Also

http://www.nessus.org/u?804a1031

Plugin Details

Severity: Medium

ID: 331333

File Name: hcl_htmo_CVE-2026-21770.nasl

Version: 1.3

Type: Local

Agent: windows

Family: Windows

Published: 7/31/2026

Updated: 8/3/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.12

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

Vector: CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2026-21770

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:hcltech:traveler_for_microsoft_outlook

Required KB Items: installed_sw/HCL Traveler

Exploit Ease: No known exploits are available

Patch Publication Date: 7/17/2026

Vulnerability Publication Date: 7/17/2026

Reference Information

CVE: CVE-2026-21770

IAVA: 2026-A-0770