How severe is CVE-2019-20091?

CVE-2019-20091 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-2019-20091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20091?

CVE-2019-20091 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20091?

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

When was CVE-2019-20091 published?

CVE-2019-20091 was published on 2019-12-30 and last updated on 2026-06-17.

CVE-2019-20091

CVE-2019-20091 is a medium-severity vulnerability in Axiosys Bento4 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Axiosys Bento4
Published: 2019-12-30
Last modified: 2026-06-17

Description

An issue was discovered in Bento4 1.5.1.0. There is a NULL pointer dereference in AP4_Descriptor::GetTag in mp42ts when called from AP4_DecoderConfigDescriptor::GetDecoderSpecificInfoDescriptor in Ap4DecoderConfigDescriptor.cpp.

Frequently asked questions

What is CVE-2019-20091?: An issue was discovered in Bento4 1.5.1.0. There is a NULL pointer dereference in AP4_Descriptor::GetTag in mp42ts when called from AP4_DecoderConfigDescriptor::GetDecoderSpecificInfoDescriptor in Ap4DecoderConfigDescriptor.cpp.
How severe is CVE-2019-20091?: CVE-2019-20091 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-2019-20091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20091?: CVE-2019-20091 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-20091 published?: CVE-2019-20091 was published on 2019-12-30 and last updated on 2026-06-17.

References

https://github.com/axiomatic-systems/Bento4/issues/462

Affected products (1)

cpe:2.3:a:axiosys:bento4:1.5.1.0:*:*:*:*:*:*:*

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