Buffer overflow in Nsasoft Nsauditor
CVE-2020-37119
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.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (45.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Nsasoft Nsauditor — versions 3.2.1.0, 3.0.28
Weakness classification (CWE)
References
- ExploitDB-48350 (Exploit, exploit, Third Party Advisory, VDB Entry)
- Nsauditor Homepage (Product, product)
- VulnCheck Advisory: Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite)) (Broken Link, third-party-advisory)
Frequently asked questions
- What is CVE-2020-37119?
- CVE-2020-37119 is a critical-severity vulnerability in Nsasoft Nsauditor, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-02-05.
- How severe is CVE-2020-37119?
- Critical severity. CVSS v3 base score is 9.8 out of 10.