---
id: CVE-2020-37199
title: >-
  NBMonitor 1.6.6.0 contains a denial of service vulnerability in its
  registration key input that allows attackers to crash the application
summary: >-
  NBMonitor 1.6.6.0 contains a denial of service vulnerability in its
  registration key input that allows attackers to crash the application.
  Attackers can generate a 1000-character buffer payload and paste it into the
  'Key' field to trigge…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-120
vendor: nsasoft
product: nbmonitor
affected:
  - nbmonitor <= 1.6.6.0
published: '2026-02-11'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-37199'
references:
  - url: 'http://www.nsauditor.com/'
    label: disclosure@vulncheck.com
  - url: 'https://www.exploit-db.com/exploits/47866'
    label: disclosure@vulncheck.com
  - url: 'https://www.vulncheck.com/advisories/nbmonitor-key-denial-of-service'
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00458
epssPercentile: 0.39033
ingestedAt: '2026-06-29T21:48:47.358Z'
---

## Overview

NBMonitor 1.6.6.0 contains a denial of service vulnerability in its registration key input that allows attackers to crash the application. Attackers can generate a 1000-character buffer payload and paste it into the 'Key' field to trigger an application crash.

## Affected

- `nbmonitor <= 1.6.6.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.