CVE-2026-21807 HCL BigFix Quantum Risk Analyzer is affected by a stack-based buffer overflow
A stack-based buffer overflow in HCL BigFix Quantum Risk Analyzer allows attackers to execute arbitrary code or cause denial of service due to missing hardening protections.
- 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-2026-21807?
CVE-2026-21807 is a low-severity memory corruption 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 binary lacks several critical, industry-standard hardening protections that could allow an attacker to cause a stack-based buffer overflow.
Weakness: CWE-121
Which versions are affected by CVE-2026-21807?
How do I fix CVE-2026-21807?
No fix has been published for CVE-2026-21807 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-21807 being exploited?
There is no known exploitation of CVE-2026-21807 in the wild and no public exploit code.
Sources
Also known as GHSA-fh44-2qvm-x6ww.