CVE-2021-47814 NBMonitor 1.6.8 - Denial of Service (PoC)
Attackers can crash NBMonitor by pasting a long string into the registration field, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-47814?
CVE-2021-47814 is a medium-severity memory corruption vulnerability in Nsauditor NBMonitor, published on 15 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
NBMonitor 1.6.8 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the registration code input field. Attackers can paste a 256-character buffer into the registration key field to trigger an application crash and potential system instability.
Weakness: CWE-120
Which versions are affected by CVE-2021-47814?
It affects 1 product.
Products include Nsasoft Nbmonitor.
How do I fix CVE-2021-47814?
No fix has been published for CVE-2021-47814 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-2021-47814 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47814 exists.
Other vulnerabilities in Nsauditor NBMonitor
Sources
Also known as GHSA-c6rm-x44q-j5rw.