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CVE-2026-108015— eMudhra Compromised Certficate vulnerability impacts HCL Notes Client

Quick assessment

Affected
HCLSoftware Notes Client
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.

八张 eMudhra 中间 CA 证书的私钥已遭泄露（详情见 https://emudhra.we-have-a-problem.com/），这影响了 HCL Notes 客户端在发出网络请求时的证书信任机制。未经身份验证的网络攻击者可通过伪造服务器证书实施中间人（MITM）攻击，从而拦截和/或篡改出站 TLS 连接的内容。

CVSS 9.1 · Critical

Possible ATT&CK Techniques 1 AI

T1595.001 · Scanning IP Blocks
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I. Basic Information for CVE-2026-108015

Vulnerability Information
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Vulnerability Title
eMudhra Compromised Certficate vulnerability impacts HCL Notes Client
Source: CVE Program / CVE List V5
Vulnerability Description
Private keys for eight eMudhra intermediate CA certificates have been compromised https://emudhra.we-have-a-problem.com/ , which impacts certificate trust for outbound network request features of HCL Notes Client.  An unauthenticated network attacker could spoof server certificates to execute a man in the middle (MITM) attack, enabling them to intercept and/or modify the content of outbound TLS connections.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
HCLSoftware Notes Client <1=2.0.2 FP8, <=14.0 FP5, 14.5, ,<=14.5.1 FP1 -

II. Public POCs for CVE-2026-108015

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-108015

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Other References for CVE-2026-108015 (1)

IV. Related Vulnerabilities

Same vendor: HCLSoftware
Same weakness: CWE-327