Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-21770— HCL Traveler for Microsoft Outlook (HTMO) is susceptible to DLL hijacking

Quick assessment

Affected
HCLSoftware HCL Traveler for Microsoft Outlook (HTMO)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HCLSoftware Traveler for Microsoft Outlook是HCLSoftware的一款信息化产品。 HCLSoftware Traveler for Microsoft Outlook 3.0.16之前版本存在权限许可和访问控制问题漏洞，该漏洞源于容易受到DLL劫持攻击，可能导致攻击者修改或替换应用程序的恶意内容。

CVSS 6.5 · Medium EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1574.002

Affected Version Matrix 1

VendorProduct Version RangeStatus
HCLSoftware HCL Traveler for Microsoft Outlook (HTMO) < 3.0.16 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-21770

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to DLL hijacking
Source: CVE Program / CVE List V5
Vulnerability Description
HCL Traveler for Microsoft Outlook (HTMO) is susceptible to a DLL hijacking vulnerability which could allow an attacker to modify or replace the application with malicious content.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
HCLSoftware Traveler for Microsoft Outlook 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HCLSoftware Traveler for Microsoft Outlook是HCLSoftware的一款信息化产品。 HCLSoftware Traveler for Microsoft Outlook 3.0.16之前版本存在权限许可和访问控制问题漏洞，该漏洞源于容易受到DLL劫持攻击，可能导致攻击者修改或替换应用程序的恶意内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HCLSoftware HCL Traveler for Microsoft Outlook (HTMO) < 3.0.16 -

II. Public POCs for CVE-2026-21770

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-21770

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-21770 (1)

Same Patch Batch · HCLSoftware · 2026-07-17 · 20 CVEs total

CVE-2024-23566 6.5 MEDIUM HCL Aftermarket EPC 授权问题漏洞
CVE-2024-42214 5.3 MEDIUM HCL Aftermarket EPC 跨站脚本漏洞
CVE-2024-23565 5.3 MEDIUM HCL Aftermarket EPC 资源管理错误漏洞
CVE-2024-23568 5.3 MEDIUM HCL Aftermarket EPC 信息泄露漏洞
CVE-2024-23574 5.3 MEDIUM HCL Aftermarket EPC 侧信道信息泄露漏洞
CVE-2024-23575 5.3 MEDIUM HCL Aftermarket EPC 信息泄露漏洞
CVE-2026-21760 4.6 MEDIUM Unauthorized Access to Admin Functionality via Forced Browsing
CVE-2024-23570 4.3 MEDIUM HCL Aftermarket EPC 信息泄露漏洞
CVE-2024-23569 4.3 MEDIUM HCL Aftermarket EPC 跨站脚本漏洞
CVE-2024-23571 4.3 MEDIUM HCL Aftermarket EPC 信息泄露漏洞
CVE-2024-23577 4.3 MEDIUM HCL Aftermarket EPC 输入验证错误漏洞
CVE-2024-23567 4.3 MEDIUM HCL Aftermarket EPC 授权问题漏洞
CVE-2024-23578 4.2 MEDIUM HCL Aftermarket EPC 配置错误漏洞
CVE-2024-23572 4.2 MEDIUM HCL Aftermarket EPC 会话机制问题漏洞
CVE-2026-21761 4.2 MEDIUM CORS Misconfiguration in DevOps Loop
CVE-2024-23573 3.7 LOW HCL Aftermarket EPC 授权问题漏洞
CVE-2026-21762 3.7 LOW Missing HTTP Security Headers in DevOps Loop
CVE-2025-59866 3.3 LOW HCLSoftware DFMPro for CATIA 权限许可和访问控制问题漏洞
CVE-2026-21764 3.1 LOW Insufficient Input Validation in DevOps Loop

IV. Related Vulnerabilities

Same product: HCL Traveler for Microsoft Outlook (HTMO)
Same vendor: HCLSoftware
Same weakness: CWE-427

V. Comments for CVE-2026-21770

No comments yet

Leave a comment