How severe is CVE-2018-20502?

CVE-2018-20502 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20502 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20502?

CVE-2018-20502 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20502?

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

When was CVE-2018-20502 published?

CVE-2018-20502 was published on 2018-12-26 and last updated on 2026-06-17.

CVE-2018-20502

CVE-2018-20502 is a medium-severity vulnerability in Axiosys Bento4 with a CVSS 3.x base score of 6.5. 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-400.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Axiosys Bento4
Published: 2018-12-26
Last modified: 2026-06-17

Description

An issue was discovered in Bento4 1.5.1-627. There is an attempt at excessive memory allocation in the AP4_DataBuffer class when called from AP4_HvccAtom::Create in Core/Ap4HvccAtom.cpp.

Frequently asked questions

What is CVE-2018-20502?: An issue was discovered in Bento4 1.5.1-627. There is an attempt at excessive memory allocation in the AP4_DataBuffer class when called from AP4_HvccAtom::Create in Core/Ap4HvccAtom.cpp.
How severe is CVE-2018-20502?: CVE-2018-20502 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20502 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20502?: CVE-2018-20502 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20502?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20502 published?: CVE-2018-20502 was published on 2018-12-26 and last updated on 2026-06-17.

References

https://github.com/axiomatic-systems/Bento4/issues/349

Affected products (1)

cpe:2.3:a:axiosys:bento4:1.5.1-627:*:*:*:*:*:*:*

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