How severe is CVE-2021-3375?

CVE-2021-3375 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3375 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3375?

CVE-2021-3375 affects Atomisystems Activepresenter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3375?

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

When was CVE-2021-3375 published?

CVE-2021-3375 was published on 2021-02-15 and last updated on 2026-06-17.

CVE-2021-3375

CVE-2021-3375 is a critical-severity vulnerability in Atomisystems Activepresenter with a CVSS 3.x base score of 9.8. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Atomisystems Activepresenter
Published: 2021-02-15
Last modified: 2026-06-17

Description

ActivePresenter 6.1.6 is affected by a memory corruption vulnerability that may result in a denial of service (DoS) or arbitrary code execution.

Frequently asked questions

What is CVE-2021-3375?: ActivePresenter 6.1.6 is affected by a memory corruption vulnerability that may result in a denial of service (DoS) or arbitrary code execution.
How severe is CVE-2021-3375?: CVE-2021-3375 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3375 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3375?: CVE-2021-3375 affects Atomisystems Activepresenter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3375?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-3375 published?: CVE-2021-3375 was published on 2021-02-15 and last updated on 2026-06-17.

References

https://code610.blogspot.com/2021/01/crashing-activepresenter.html

Affected products (1)

cpe:2.3:a:atomisystems:activepresenter:6.1.6:*:*:*:*:*:*:*

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