How severe is CVE-2020-23331?

CVE-2020-23331 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-2020-23331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23331?

CVE-2020-23331 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23331?

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.

When was CVE-2020-23331 published?

CVE-2020-23331 was published on 2021-08-17 and last updated on 2026-06-17.

CVE-2020-23331

CVE-2020-23331 is a high-severity vulnerability in Axiosys Bento4 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Axiosys Bento4
Published: 2021-08-17
Last modified: 2026-06-17

Description

An issue was discovered in Bento4 version 06c39d9. A NULL pointer dereference exists in the AP4_DescriptorListWriter::Action component located in /Core/Ap4Descriptor.h. It allows an attacker to cause a denial of service (DOS).

Frequently asked questions

What is CVE-2020-23331?: An issue was discovered in Bento4 version 06c39d9. A NULL pointer dereference exists in the AP4_DescriptorListWriter::Action component located in /Core/Ap4Descriptor.h. It allows an attacker to cause a denial of service (DOS).
How severe is CVE-2020-23331?: CVE-2020-23331 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-2020-23331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23331?: CVE-2020-23331 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23331?: 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.
When was CVE-2020-23331 published?: CVE-2020-23331 was published on 2021-08-17 and last updated on 2026-06-17.

References

https://github.com/axiomatic-systems/Bento4/issues/509

Affected products (1)

cpe:2.3:a:axiosys:bento4:-:*:*:*:*:*:*:*

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