CVE-2021-28550
Adobe Acrobat Reader use after free vulnerability could lead to arbitrary code execution
KEVHIGH 8.8EPSS 51.9%
Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
- Affected
- Adobe · Acrobat Reader
- CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v3.0 ADOBE
- 9.6 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P - EPSS
- 51.85% chance of exploitation in the next 30 days, 99th percentile
- CISA KEV
- added 2021-11-03
- Published
- 2021-09-02
- Updated
- 2025-10-21
Proof-of-concept exploits (1)
- jonaslejon/malicious-pdf4480★ · 2026-08-27
Security advisories
- https://helpx.adobe.com/security/products/acrobat/apsb21-29.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28550