What is CVE-2021-33362?

CVE-2021-33362 is a high-severity vulnerability in Gpac, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-09-13.

How severe is CVE-2021-33362?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Gpac

CVE-2021-33362

Stack buffer overflow in the hevc_parse_vps_extension function in MP4Box in GPAC 1.0.1 allows attackers to cause a denial of service or execute arbitrary code via a crafted file.

Vulnerability class: Buffer Overflow

Published 2021-09-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.0th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Gpac — versions 1.0.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/gpac/gpac/issues/1780 (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/gpac/gpac/commit/1273cdc706eeedf8346d4b9faa5b33435056061d (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33362?: CVE-2021-33362 is a high-severity vulnerability in Gpac, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-09-13.
How severe is CVE-2021-33362?: High severity. CVSS v3 base score is 7.8 out of 10.