CVE-2026-21807

Received Received - Intake

Stack-Based Buffer Overflow in HCL BigFix Quantum Risk Analyzer

Publication date: 2026-08-26

Last updated on: 2026-08-26

Assigner: HCL Software

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-26

Last Modified

2026-08-26

Generated

2026-08-27

AI Q&A

2026-08-27

EPSS Evaluated

N/A

NVD

CVE-2026-21807

EUVD

EUVD-2026-66805

Affected Vendors & Products

Vendor	Product	Version / Range
hcl	bigfix_quantum_risk_analyzer	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

The vulnerability in HCL BigFix Quantum Risk Analyzer involves a binary that lacks critical hardening protections. This could allow an attacker to trigger a stack-based buffer overflow, potentially leading to arbitrary code execution or system compromise.

Impact Analysis

An attacker could exploit this flaw to execute malicious code on your system, gain unauthorized access, or cause denial-of-service conditions. The impact depends on system privileges and configuration.

Compliance Impact

The vulnerability's potential for stack-based buffer overflow could lead to unauthorized code execution, which may result in data breaches or unauthorized access to sensitive information. This could impact compliance with GDPR by risking personal data exposure and HIPAA by compromising protected health information if exploited.

Mitigation Strategies

Apply vendor-provided patches or updates for HCL BigFix Quantum Risk Analyzer to address the missing hardening protections. Monitor HCL's security advisories for updates and restrict access to the binary to trusted users only.

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