# CVE-2026-21809

## Summary

- **CVE ID:** CVE-2026-21809
- **Severity:** LOW
- **CVSS Score:** 3.9 (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L)
- **CWE:** CWE-209
- **Published:** Aug 26, 2026
- **Last Modified:** Aug 27, 2026

## Description

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.

## Affected Products

- HCLSoftware — BigFix Quantum Risk Analyzer (2.0.1.47)

## References

- [CNA](https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0133289)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.09%
- **EPSS Percentile:** 0.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._