What is CVE-2020-24428?

CVE-2020-24428 is a high-severity vulnerability in Adobe Acrobat, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.7/10. Published 2020-11-05.

How severe is CVE-2020-24428?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Adobe Acrobat

CVE-2020-24428

Acrobat Reader DC versions 2020.012.20048 (and earlier), 2020.001.30005 (and earlier) and 2017.011.30175 (and earlier) for macOS are affected by a time-of-check time-of-use (TOCTOU) race condition vulnerability that could result in local privilege escalation. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2020-11-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Adobe Acrobat
Adobe Acrobat Dc
Adobe Acrobat Reader — versions unspecified
Adobe Acrobat Reader
Adobe Acrobat Reader Dc
Apple macOS
Microsoft Windows

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

helpx.adobe.com/security/products/acrobat/apsb20-67.html (Vendor Advisory)

Frequently asked questions

What is CVE-2020-24428?: CVE-2020-24428 is a high-severity vulnerability in Adobe Acrobat, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.7/10. Published 2020-11-05.
How severe is CVE-2020-24428?: High severity. CVSS v3 base score is 7.7 out of 10.