How severe is CVE-2021-47814?

CVE-2021-47814 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-47814 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47814?

CVE-2021-47814 affects Nsasoft Nbmonitor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47814?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2021-47814 have an EU (EUVD) identifier?

Yes. CVE-2021-47814 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3019.

When was CVE-2021-47814 published?

CVE-2021-47814 was published on 2026-01-16 and last updated on 2026-06-29.

CVE-2021-47814

CVE-2021-47814 is a high-severity vulnerability in Nsasoft Nbmonitor with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.7
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3019
Weakness: CWE-120
Affected product: Nsasoft Nbmonitor
Published: 2026-01-16
Last modified: 2026-06-29

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-47814?: CVE-2021-47814 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-47814 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47814?: CVE-2021-47814 affects Nsasoft Nbmonitor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47814?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2021-47814 have an EU (EUVD) identifier?: Yes. CVE-2021-47814 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3019.
When was CVE-2021-47814 published?: CVE-2021-47814 was published on 2026-01-16 and last updated on 2026-06-29.

References

Affected products (1)

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

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