What is CVE-2020-19720?

CVE-2020-19720 is a medium-severity vulnerability in Axiosys Bento4, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2021-07-13.

How severe is CVE-2020-19720?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-19720 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Axiosys Bento4

CVE-2020-19720

An unhandled memory allocation failure in Core/AP4IkmsAtom.cpp of Bento 1.5.1-628 causes a NULL pointer dereference, leading to a denial of service (DOS).

Vulnerability class: Buffer Overflow

Published 2021-07-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Axiosys Bento4 — versions 1.5.1-628

Weakness classification (CWE)

Public proof-of-concept exploits

s-cube-xmu/Bug_

References

github.com/axiomatic-systems/Bento4/issues/413 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-19720?: CVE-2020-19720 is a medium-severity vulnerability in Axiosys Bento4, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2021-07-13.
How severe is CVE-2020-19720?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-19720 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.