CVE-2026-21809

Information exposure via verbose validation errors

Published Aug 26, 2026 · Updated Aug 26, 2026

Information exposure in HCL BigFix Quantum Risk Analyzer 2.0.1.47 allows local users to refine fuzzing inputs through malformed data. Its validation process returns overly descriptive errors for malformed input, exposing processing detail that makes reconnaissance and automated fuzzing more efficient. Exploitation requires local, highly privileged access and complex input crafting; HCL has not identified the validation locus or specific exposed data.

CVSS severity3.9
Low
EPSS probability0.09%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in HCL BigFix Quantum Risk Analyzer 2.0.1.47 allows local users to refine fuzzing inputs through malformed data. Its validation process returns overly descriptive errors for malformed input, exposing processing detail that makes reconnaissance and automated fuzzing more efficient. Exploitation requires local, highly privileged access and complex input crafting; HCL has not identified the validation locus or specific exposed data.

The record

CVE
CVE-2026-21809
Published
Aug 26, 2026
Updated
Aug 26, 2026
Vendor
HCLSoftware
Product
HCL BigFix Quantum Risk Analyzer
Classifications
CWE-209
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.1.47

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

HCLSoftware · HCL BigFix Quantum Risk Analyzerversion=2.0.1.47

Published CVSS scores

3.9HCL SoftwareCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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