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CVE-2021-28550

Adobe Acrobat and Reader Use-After-Free Vulnerability

Published Sep 2, 2021 · updated Jun 16, 2026 · adobe acrobat dc

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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 2, 2021 · Catalog

    Detected

    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 maliciou

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Nov 17, 2021 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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 maliciou

Required action

Apply updates per vendor instructions.

CISA due date Nov 17, 2021

Affected

  • cpe adobe/acrobatversion unspecified
  • cpe adobe/acrobat dcversion unspecified
  • cpe adobe/acrobat readerversion unspecified
  • cpe adobe/acrobat reader dcversion unspecified
  • vendor Adobe Acrobat and Readerversion unspecified

Sources

  • CISA KEVConfirmed exploitationCVE-2021-28550

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-28550

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-28550

    30-day exploitation probability 51.9%

    first.org
  • NIST NVDVulnerability recordCVE-2021-28550

    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

    nvd.nist.gov

References