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 ↗

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

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

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