What is CVE-2021-47815?

CVE-2021-47815 is a high-severity vulnerability in Nsasoft Nsauditor, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-01-16.

How severe is CVE-2021-47815?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Nsasoft Nsauditor

CVE-2021-47815

Nsauditor 3.2.3 contains a denial of service vulnerability in the registration code input field that allows attackers to crash the application. Attackers can paste a large buffer of 256 repeated characters into the 'Key' field to trigger a…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (10.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nsasoft Nsauditor
Nsauditor — versions 3.2.3.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

ExploitDB-49965 (Exploit, exploit, Third Party Advisory)
Vendor Homepage (Product, product)
VulnCheck Advisory: Nsauditor 3.2.3 - Denial of Service (PoC) (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2021-47815?: CVE-2021-47815 is a high-severity vulnerability in Nsasoft Nsauditor, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-01-16.
How severe is CVE-2021-47815?: High severity. CVSS v3 base score is 7.5 out of 10.