CVE-2026-21809— HCL BigFix Quantum Risk Analyzer is affected by generating error messages with sensitive information
Quick assessment
Affected
HCLSoftware BigFix Quantum Risk Analyzer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
HCL BigFix Quantum Risk Analyzer 在遇到格式错误的输入时，其特定的验证过程会返回描述性过强的错误信息，这会使攻击者能够进行更高效的侦察，并据此微调自动化模糊测试工具以生成有效的输入。
Possible ATT&CK Techniques 1 AI
T1595 · Active Scanning
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I. Basic Information for CVE-2026-21809
Vulnerability Information
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Vulnerability Title
HCL BigFix Quantum Risk Analyzer is affected by generating error messages with sensitive information
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| HCLSoftware | BigFix Quantum Risk Analyzer | 2.0.1.47 | - |
|
II. Public POCs for CVE-2026-21809
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-21809 (1)
Same Patch Batch · HCLSoftware · 2026-08-26 · 6 CVEs total
| CVE-2026-21810 | 4.4 MEDIUM | HCL BigFix Quantum Risk Analyzer is affected by a hardcoded external resource reference an |
| CVE-2026-21808 | 4.1 MEDIUM | HCL BigFix Quantum Risk Analyzer is affected by logging sensitive information |
| CVE-2026-21807 | 3.9 LOW | HCL BigFix Quantum Risk Analyzer is affected by a stack-based buffer overflow |
| CVE-2025-62341 | 3.7 LOW | HCL Connections is vulnerable to server-side request forgery (SSRF) |
| CVE-2026-56547 | 3.5 LOW | An input reflection vulnerability affects HCL Traveler |
IV. Related Vulnerabilities
Same vendor: HCLSoftware
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CVE-2025-62341
HCL Connections is vulnerable to server-side request forgery -
CVE-2026-21808
HCL BigFix Quantum Risk Analyzer is affected by logging sens -
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HCL BigFix Quantum Risk Analyzer is affected by a stack-base -
CVE-2026-21810
HCL BigFix Quantum Risk Analyzer is affected by a hardcoded -
CVE-2026-56547
An input reflection vulnerability affects HCL Traveler
Same weakness: CWE-209
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V. Comments for CVE-2026-21809
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