---
title: "CVE-2026-108015: HCL Notes Client - Man in the Middle"
description: "HCL Notes Client contains a man in the middle vulnerability caused by compromised private keys of eight eMudhra intermediate CA certificates, letting unauthenticated network attackers intercept or modify outbound TLS connections, exploit requires network access."
url: https://panop.io/threat-heartbeat/CVE-2026-108015/
---

# CVE-2026-108015 HCL Notes Client - Man in the Middle

HCL Notes Client contains a man in the middle vulnerability caused by compromised private keys of eight eMudhra intermediate CA certificates, letting unauthenticated network attackers intercept or modify outbound TLS connections, exploit requires network access.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-108015)

## Details

Type

Man in the Middle

Impact

Man In The Middle

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

27 October 2026

Updated

29 October 2026

Weakness

[CWE-327](https://cwe.mitre.org/data/definitions/327.html)

## Vendor fix

Revoke compromised certificates and update to use trusted certificates; ensure latest security patches are applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-108015](https://nvd.nist.gov/vuln/detail/CVE-2026-108015)
- [https://support.hcl-software.com/csm?id=kb\_article&sysparm\_article=KB0134749](https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0134749)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)