November 3, 2021 · Applied Cybernetics Group
CVE-2021-28550 — Adobe Acrobat and Reader
Adobe Acrobat and Reader Use-After-Free Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Adobe
- Product
- Acrobat and Reader
- EPSS
- 98.8th percentile (score 0.520, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- ATT&CK
- T1204.002 · signal rollup
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-28550
CISA short description
Adobe Acrobat and Reader contains a use-after-free vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.
Required action
Apply updates per vendor instructions.