Information disclosure in Hclsoftware Bigfix Quantum Risk Analyzer

CVE-2026-21809

HCL BigFix Quantum Risk Analyzer has a certain validation process that provides overly descriptive error messages when it encounters malformed input which can allow an attacker to conduct more efficient reconnaissance and fine-tune automated fuzzing tools to produce valid input.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.001 (0.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-21809: held from 0.001 to 0.001.

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

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-21809?
CVE-2026-21809 is a low-severity vulnerability in Hclsoftware Bigfix Quantum Risk Analyzer, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 3.9/10. Published 2026-08-26.
How severe is CVE-2026-21809?
Low severity. CVSS v3 base score is 3.9 out of 10.