What is CVE-2020-24421?

CVE-2020-24421 is a medium-severity vulnerability in Adobe Indesign, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2020-10-21.

How severe is CVE-2020-24421?

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

NULL pointer dereference in Adobe Indesign

CVE-2020-24421

Adobe InDesign version 15.1.2 (and earlier) is affected by a NULL pointer dereference bug that occurs when handling a malformed .indd file. The impact is limited to causing a denial-of-service of the client application. User interaction is required to exploit this issue.

Published 2020-10-21 · 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: 0.018 (77.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Adobe Indesign — versions unspecified
Microsoft Windows

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

helpx.adobe.com/security/products/indesign/apsb20-66.html (Vendor Advisory)

Frequently asked questions

What is CVE-2020-24421?: CVE-2020-24421 is a medium-severity vulnerability in Adobe Indesign, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2020-10-21.
How severe is CVE-2020-24421?: Medium severity. CVSS v3 base score is 5.5 out of 10.