What is CVE-2026-21765?

CVE-2026-21765 is a high-severity vulnerability in Hclsoftware Bigfix Platform, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2026-04-02.

How severe is CVE-2026-21765?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Hclsoftware Bigfix Platform

CVE-2026-21765

HCL BigFix Platform is affected by insecure permissions on private cryptographic keys. The private cryptographic keys located on a Windows host machine might be subject to overly permissive file system permissions.

Published 2026-04-02 · last modified 2026-10-26.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.0th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Hclsoftware Bigfix Platform — versions 11.0.0 - 11.0.5
Hcltech Bigfix Platform

Weakness classification (CWE)

References

support.hcl-software.com/csm (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21765?: CVE-2026-21765 is a high-severity vulnerability in Hclsoftware Bigfix Platform, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2026-04-02.
How severe is CVE-2026-21765?: High severity. CVSS v3 base score is 8.8 out of 10.