CVE-2021-28550Actively exploitedAdded to KEV 2021-11-03

Adobe Acrobat and Reader Use-After-Free Vulnerability

Adobe, Acrobat and Reader

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.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

Critical

51.9%

estimated chance of real-world exploitation in the next 30 days, higher than 98.9% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2021-11-17

CWE-416

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