CVE-2020-37119 Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite))
Attackers can execute arbitrary code by triggering a buffer overflow in the DNS Lookup tool via a malicious query.
- 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-2020-37119?
CVE-2020-37119 is a high-severity memory corruption vulnerability in Nsasoft Nsauditor, published on 5 Feb 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
Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a carefully constructed exploit.
Which versions are affected by CVE-2020-37119?
It affects 1 product.
Products include Nsasoft Nsauditor.
How do I fix CVE-2020-37119?
No fix has been published for CVE-2020-37119 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-2020-37119 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37119 exists.
Other vulnerabilities in Nsasoft Nsauditor
- CVE-2018-25213 Nsauditor 3.0.28.0 Local SEH Buffer Overflow
- CVE-2019-25597 NSauditor 3.1.2.0 Denial of Service via Community Field
- CVE-2020-37130 Nsauditor 3.2.0.0 - 'Name' Denial of Service
- CVE-2021-47895 Nsauditor 3.2.2.0 - 'Event Description' Denial of Service
- CVE-2021-47815 Nsauditor 3.2.3 - Denial of Service (PoC)
Sources
Also known as GHSA-qpw6-3qr8-fmwg.