What is CVE-2020-23333?

CVE-2020-23333 is a high-severity vulnerability in Axiosys Bento4, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-08-17.

How severe is CVE-2020-23333?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Axiosys Bento4

CVE-2020-23333

A heap-based buffer overflow exists in the AP4_CttsAtom::AP4_CttsAtom component located in /Core/Ap4Utils.h of Bento4 version 06c39d9. This can lead to a denial of service (DOS).

Vulnerability class: Buffer Overflow

Published 2021-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Axiosys Bento4

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/axiomatic-systems/Bento4/issues/507 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-23333?: CVE-2020-23333 is a high-severity vulnerability in Axiosys Bento4, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-08-17.
How severe is CVE-2020-23333?: High severity. CVSS v3 base score is 7.5 out of 10.