What is CVE-2020-37196?

CVE-2020-37196 is a high-severity vulnerability in Nsasoft Domain Name Search Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-02-11.

How severe is CVE-2020-37196?

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

Buffer overflow in Nsasoft Domain Name Search Software

CVE-2020-37196

Dnss Domain Name Search Software contains a denial of service vulnerability that allows attackers to crash the application by providing an oversized registration key. Attackers can generate a 1000-character buffer payload and paste it into the registration key field to trigger an application crash.

Vulnerability class: Buffer Overflow

Published 2026-02-11 · last modified 2026-06-29.

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.

EPSS exploit prediction

EPSS: 0.005 (37.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000

Affected products

Weakness classification (CWE)

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

References

www.exploit-db.com/exploits/47856 (Exploit, VDB Entry, exploit)
www.nsauditor.com/ (Product, product)
www.vulncheck.com/advisories/dnss-domain-name-search-software-key-denial-of-ser… (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2020-37196?: CVE-2020-37196 is a high-severity vulnerability in Nsasoft Domain Name Search Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2026-02-11.
How severe is CVE-2020-37196?: High severity. CVSS v3 base score is 7.5 out of 10.