May 2021 Patch Tuesday: Adobe fixes exploited Reader 0-day, Microsoft patches 55 holes May 12, 2021 On this May 2021 Patch Tuesday: Adobe has fixed a Reader flaw exploited in attacks in the wild, as well as delivered security updates for eleven other products, including Magento, Adobe InDesign, Adobe After Effects, Adobe Creative Cloud Desktop Application, and others Microsoft has plugged 55 security holes, none actively exploited SAP has released 14 new and updated security patches Adobe updates Adobe has released security updates for 12 of its products, fixing a total of 44 CVE-numbered flaws. The updates that should be prioritized are those for Adobe Acrobat and Reader for Windows and macOS, because they fix a number of critical and important vulnerabilities in a widely used product that has often been targeted by attackers. Another good reason is that one of these – CVE-2021-28550 – “has been exploited in the wild in limited attacks targeting Adobe Reader users on Windows.”