High severity · published Feb 11, 2026
CVE-2020-37202
NetworkSleuth 3.0.0.0 - 'Key' Denial of Service
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
NetworkSleuth 3.0.0.0 contains a denial of service vulnerability that allows attackers to crash the application by supplying 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NN
Nsauditor NetworkSleuth · Nsasoft
3.0.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-37202
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-37202
www.nsauditor.com
http://www.nsauditor.com/
www.exploit-db.com
https://www.exploit-db.com/exploits/47853
www.vulncheck.com
https://www.vulncheck.com/advisories/networksleuth-key-denial-of-service