# CVE-2026-21808 — HCLSoftware BigFix Quantum Risk Analyzer

> As of 2026-08-27, CVE-2026-21808 is a MEDIUM-severity vulnerability in HCLSoftware BigFix Quantum Risk Analyzer, CVSS v3.1 4.1, EPSS 0.1% (98.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-21808 as of 2026-08-27; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-27

## What is CVE-2026-21808?

HCL BigFix Quantum Risk Analyzer generates highly detailed logging information by default which increases the risk of sensitive data leakage and can provide an attacker with internal application logic and architectural details.

The record classifies CVE-2026-21808 under weakness class [CWE-532](https://intel.threadlinqs.com/cwe/CWE-532). Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 40 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.1 — MEDIUM (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 98.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-26, last modified 2026-08-27

## Is CVE-2026-21808 being exploited?

It currently carries a trending score of 54 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **HCLSoftware**: BigFix Quantum Risk Analyzer

## How to fix CVE-2026-21808

No vendor patch reference has been recorded for CVE-2026-21808 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-21808

No threat campaign in the Threadlinqs corpus currently references CVE-2026-21808, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-08-27. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

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

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-21808
Full detection coverage and IOCs for threats exploiting CVE-2026-21808 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp