CVE-2026-21809 HCL BigFix Quantum Risk Analyzer is affected by generating error messages with sensitive information
Attackers can obtain sensitive information from overly descriptive error messages to aid reconnaissance and fuzzing efforts.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21809?
CVE-2026-21809 is a low-severity vulnerability in HCLSoftware BigFix Quantum Risk Analyzer, published on 26 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-209
Which versions are affected by CVE-2026-21809?
How do I fix CVE-2026-21809?
No fix has been published for CVE-2026-21809 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21809 being exploited?
There is no known exploitation of CVE-2026-21809 in the wild and no public exploit code.
Sources
Also known as GHSA-5frw-h466-x38v.