What is CVE-2021-32440?

CVE-2021-32440 is a medium-severity vulnerability in Gpac, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-08-11.

How severe is CVE-2021-32440?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Gpac

CVE-2021-32440

The Media_RewriteODFrame function in GPAC 1.0.1 allows attackers to cause a denial of service (NULL pointer dereference) via a crafted file in the MP4Box command.

Published 2021-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Gpac — versions 1.0.1

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/gpac/gpac/issues/1772 (Exploit, Third Party Advisory, Issue Tracking)
github.com/gpac/gpac/commit/f0ba83717b6e4d7a15a1676d1fe06152e199b011 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-32440?: CVE-2021-32440 is a medium-severity vulnerability in Gpac, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-08-11.
How severe is CVE-2021-32440?: Medium severity. CVSS v3 base score is 5.5 out of 10.