What is the CVSS score of CVE-2021-47814?

CVE-2021-47814 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.0%.

Which versions of Nbmonitor are affected by CVE-2021-47814?

Organizations using NBMonitor 1.6.8 face notable risk from CVE-2021-47814, a buffer overflow vulnerability rated CVSS 7.5.

Is there a public PoC exploit available for CVE-2021-47814?

Yes, a public proof-of-concept exploit is available for CVE-2021-47814. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47814?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Nbmonitor CVE-2021-47814

HIGH

Classic Buffer Overflow (CWE-120)

2026-01-16 disclosure@vulncheck.com

Denial Of Service Nbmonitor

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 29, 2026 - 19:20 vuln.today

Public exploit code

CVE Published

Jan 16, 2026 - 00:16 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Technical ContextAI

Classified as CWE-120 (Classic Buffer Overflow). Affects Nbmonitor. 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.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.

CVE-2021-47814 vulnerability details – vuln.today

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Nbmonitor CVE-2021-47814

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code