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CVE-2026-21807— HCL BigFix Quantum Risk Analyzer is affected by a stack-based buffer overflow

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是印度HCL公司的一款风险量化分析工具。 HCL BigFix Quantum Risk Analyzer 2.0.1.47版本存在缓冲区错误漏洞，该漏洞源于二进制文件缺乏多项关键的行业标准加固保护，可能导致栈缓冲区溢出。

CVSS 3.9 · Low EPSS 0.09% · P0

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 1

VendorProduct Version RangeStatus
HCLSoftware BigFix Quantum Risk Analyzer 2.0.1.47 affected
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I. Basic Information for CVE-2026-21807

Vulnerability Information
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Vulnerability Title
HCL BigFix Quantum Risk Analyzer is affected by a stack-based buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
HCL BigFix Quantum Risk Analyzer binary lacks several critical, industry-standard hardening protections that could allow an attacker to cause a stack-based buffer overflow.
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
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
HCL BigFix Quantum Risk Analyzer 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HCL BigFix Quantum Risk Analyzer是印度HCL公司的一款风险量化分析工具。 HCL BigFix Quantum Risk Analyzer 2.0.1.47版本存在缓冲区错误漏洞，该漏洞源于二进制文件缺乏多项关键的行业标准加固保护，可能导致栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HCLSoftware BigFix Quantum Risk Analyzer 2.0.1.47 -

II. Public POCs for CVE-2026-21807

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III. Intelligence Information for CVE-2026-21807

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Vendor Advisories for CVE-2026-21807 (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-2026-21809 3.9 LOW HCL BigFix Quantum Risk Analyzer is affected by generating error messages with sensitive i
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 product: BigFix Quantum Risk Analyzer
Same vendor: HCLSoftware
Same weakness: CWE-121

V. Comments for CVE-2026-21807

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