Security Advisory - June 8, 2021

Zscaler protects against 1 new vulnerability for Adobe Acrobat and Reader.

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protections for the following 1 vulnerability included in the June 2021 Adobe security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the June release and deploy additional protections, as necessary.

APSB21-37 – Security updates available for Adobe Acrobat and Reader.

Adobe has released security updates for Adobe Acrobat and Reader for Windows and macOS. These updates address multiple critical and important vulnerabilities. Successful exploitation could lead to arbitrary code execution in the context of the current user.

Affected Software

  • Acrobat DC Continuous 2021.001.20155 and earlier versions for Windows
  • Acrobat Reader DC Continuous 2021.001.20155 and earlier versions for Windows
  • Acrobat DC Continuous 2021.001.20155 and earlier versions for macOS
  • Acrobat Reader DC Continuous 2021.001.20155 and earlier versions for macOS
  • Acrobat 2020 Classic 2020 2020.001.30025 and earlier versions for Windows & macOS
  • Acrobat Reader 2020 Classic 2020 2020.001.30025 and earlier versions for Windows & macOS
  • Acrobat 2017 Classic 2017 2017.011.30196 and earlier versions for Windows & macOS
  • Acrobat Reader 2017 Classic 2017 2017.011.30196 and earlier versions for Windows & macOS

CVE-2021-28554 – Out-of-bounds read leading to Arbitrary code execution.

Severity: Critical