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CVE-2021-28550

CISA KEV

Published November 3, 2021 · Updated April 3, 2026

high
Official 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.

Affected Products

VendorProduct
AdobeAcrobat and Reader

Patch Status

Patch by 2021-11-17

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2021-28550.