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Tripwire’s May 2021 Patch Priority Index (PPI) brings together important vulnerabilities from Google Chrome, Adobe and Microsoft.

First on the patch priority list this month are patches for macOS (CVE-2021-30657) and Google Chrome (CVE-2021-21220). Exploits for these vulnerabilities have been recently added to the Metasploit Exploit Framework. These systems should be patched as soon as possible.

Up next is a patch for a memory corruption vulnerability in Internet Explorer.

Next on the patch priority list this month are patches for Microsoft Excel, Office, and Word. These patches resolve 7 issues including remote code execution and information disclosure vulnerabilities.

Next are patches for Adobe Reader and Acrobat. These patches resolve 14 issues, including arbitrary code execution, privilege escalation, memory leak vulnerabilities.

Next are patches that affect components of the Windows operating systems. These patches resolve over 20 vulnerabilities, including elevation of privilege, information disclosure, remote code execution, security feature bypass, denial of service, and memory corruption vulnerabilities. These vulnerabilities affect core Windows, WalletService, Container Isolation FS drive, Container Manager Service, OLE Automation, SSDP, Meida Foundation, Jet Red Database Engine, Wireless Networking, and others.

Up next are patches for .NET, Visual Studio Code, and Hyper-V that resolve elevation of privilege and remote code exeuction vulnerabilities.

Lastly, administrators should focus on server-side patches for Microsoft, which resolve issues in Microsoft Exchange and SharePoint. These patches resolve several issues including remote code execution, information disclosure, spoofing, and denial of service vulnerabilities.

Exploit Framework: MetasploitCVE-2021-30657, CVE-2021-21220
Internet ExplorerCVE-2021-26419
Microsoft OfficeCVE-2021-31176
Microsoft Office WordCVE-2021-31180
Microsoft Office ExcelCVE-2021-31174, CVE-2021-31178, CVE-2021-31179, CVE-2021-31175, CVE-2021-31177
APSB21-29: Adobe Reader and AcrobatCVE-2021-28561, CVE-2021-28560, CVE-2021-28558, CVE-2021-28557, CVE-2021-28555, CVE-2021-28565, CVE-2021-28564, CVE-2021-21044, CVE-2021-21038, CVE-2021-21086, CVE-2021-28559, CVE-2021-28562, CVE-2021-28550, CVE-2021-28553
Microsoft WindowsCVE-2021-31187, CVE-2021-31184, CVE-2021-31190, CVE-2021-31166, CVE-2021-31193, CVE-2021-31192, CVE-2021-28455, CVE-2021-31188, CVE-2021-31170, CVE-2021-31182, CVE-2021-28479, CVE-2021-31185, CVE-2021-31194, CVE-2020-24587, CVE-2020-24588, CVE-2020-26144, CVE-2021-31168, CVE-2021-31169, CVE-2021-31167, CVE-2021-31165, CVE-2021-31208, CVE-2021-31186, CVE-2021-31191, CVE-2021-31205
.NET and Visual StudioCVE-2021-31204
Microsoft Hyper-VCVE-2021-28476
Microsoft Exchange ServerCVE-2021-31195, CVE-2021-31198, CVE-2021-31207, CVE-2021-31209
Microsoft Office SharePointCVE-2021-31171, CVE-2021-31181, CVE-2021-31173, CVE-2021-28474, CVE-2021-28478, CVE-2021-26418, CVE-2021-31172