How severe is CVE-2020-23884?

CVE-2020-23884 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-23884 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23884?

CVE-2020-23884 affects Nomacs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23884?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-23884 published?

CVE-2020-23884 was published on 2021-11-10 and last updated on 2026-06-17.

CVE-2020-23884

CVE-2020-23884 is a medium-severity vulnerability in Nomacs with a CVSS 3.x base score of 5.5. 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: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Nomacs
Published: 2021-11-10
Last modified: 2026-06-17

Description

A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.

Frequently asked questions

What is CVE-2020-23884?: A buffer overflow in Nomacs v3.15.0 allows attackers to cause a denial of service (DoS) via a crafted MNG file.
How severe is CVE-2020-23884?: CVE-2020-23884 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-23884 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23884?: CVE-2020-23884 affects Nomacs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23884?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-23884 published?: CVE-2020-23884 was published on 2021-11-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nomacs:nomacs:3.15.0:*:*:*:*:*:*:*

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