Denial of Service Vulnerability in NBMonitor by NSA Auditor
CVE-2021-47814

6.7MEDIUM

Key Information:

Vendor

Nsauditor

Status
Nbmonitor
Vendor
CVE Published:
15 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47814?

The NBMonitor software version 1.6.8 is susceptible to a denial of service vulnerability. An attacker can exploit this weakness by inputting a lengthy 256-character buffer into the registration code field. This action can lead to a crash of the application, resulting in system instability. Such vulnerabilities can jeopardize the operational continuity of systems running NBMonitor. To mitigate this risk, it is crucial to implement the latest updates and apply security best practices.

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Affected Version(s)

NBMonitor 1.6.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47814 - Proof of Concept

References

https://www.exploit-db.com/exploits/49964
exploit
http://www.nsauditor.com
product
https://www.vulncheck.com/advisories/nbmonitor-denial-of-...
third-party-advisory

CVSS V4

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Erick Galindo
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