CVE-2021-47814

NBMonitor 1.6.8 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the registration code input field. Attackers can paste a 256-character buffer into the registration key field to trigger an application crash and potential system instability.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
http://www.nsauditor.com	Product
https://www.exploit-db.com/exploits/49964	Exploit Third Party Advisory
https://www.vulncheck.com/advisories/nbmonitor-denial-of-service-poc	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nsasoft:nbmonitor:1.6.8:*:*:*:*:*:*:*

History

17 Jun 2026, 04:18

Type	Values Removed	Values Added
Summary		(es) NBMonitor 1.6.8 contiene una vulnerabilidad de denegación de servicio que permite a los atacantes bloquear la aplicación desbordando el campo de entrada del código de registro. Los atacantes pueden pegar un búfer de 256 caracteres en el campo de clave de registro para desencadenar un bloqueo de la aplicación y una posible inestabilidad del sistema.

29 Jan 2026, 19:20

Type	Values Removed	Values Added
CPE		cpe:2.3:a:nsasoft:nbmonitor:1.6.8:::::::*
First Time		Nsasoft Nsasoft nbmonitor
References	~~() http://www.nsauditor.com -~~	() http://www.nsauditor.com - Product
References	~~() https://www.exploit-db.com/exploits/49964 -~~	() https://www.exploit-db.com/exploits/49964 - Exploit, Third Party Advisory
References	~~() https://www.vulncheck.com/advisories/nbmonitor-denial-of-service-poc -~~	() https://www.vulncheck.com/advisories/nbmonitor-denial-of-service-poc - Third Party Advisory

16 Jan 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-16 00:16

Updated : 2026-06-29 18:28

NVD link : CVE-2021-47814

Mitre link : CVE-2021-47814

CVE.ORG link : CVE-2021-47814

JSON object : View

Products Affected

nsasoft

nbmonitor

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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