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Microsoft patches 119 flaws and 2 zero-days in security update

Microsoft’s April patch Tuesday has around 119 security fixes across all Microsoft software. The patches include 10 critical vulnerabilities and two zero-days.

Products impacted this these security updates include Windows, Microsoft Office, Edge, Hyper-V, Dynamics, File Server, Windows SMB and Skype for Business. 

This latest round of patches, usually released every second Tuesday of each month (hence the name Patch Tuesday), addresses a number of issues, including remote code execution and elevation of privilege bugs in addition to denial-of-service, information leaks and spoofing issues. The number of bugs in each category is:

  • 47 Elevation of Privilege vulnerabilities.
  • 47 Remote Code Execution vulnerabilities.
  • 13 Information disclosure vulnerabilities.
  • 9 Denial of Service vulnerabilities. 
  • 3 Spoofing vulnerabilities.
  • 26 Edge (Chromium) vulnerabilities. 

The 26 Edge (Chromium) vulnerabilities aren’t included in Microsoft’s patch count. The two zero-day vulnerabilities are as follows.

VulnerabilityDescription
VE-2022-24521This is a privilege escalation bug in the Windows Common Log File System Driver. Microsoft has stated that the vulnerability is actively being exploited despite the bug not being public until now. The issue has a CVSS score of 7.8.
CVE-2022-26904This is a known zero-day escalation of privilege flaw that affects the Windows User Profile Service. According to Microsoft, the attack complexity is high as it causes an attacker to win a race condition. The vulnerability has a CVSS score of 7.0.

Ten critical vulnerabilities have been patched in this round.

Impacted ProductVulnerabilityVulnerability type
LDAP – Lightweight Directory Access ProtocolCVE-2022-26919Remote Code Execution
Microsoft DynamicsCVE-2022-23259Remote Code Execution
Windows Hyper-VCVE-2022-22008Remote Code Execution
Windows Hyper-VCVE-2022-24537Remote Code Execution
Windows Hyper-V
CVE-2022-23257
Remote Code Execution
Windows Network File System
CVE-2022-24491
Remote Code Execution
Windows Network File System
CVE-2022-24497
Remote Code Execution
Windows Remote Procedure Call RuntimeCVE-2022-26809Remote Code Execution
Windows SMBCVE-2022-24541Remote Code Execution
Windows SMBCVE-2022-24500Remote Code Execution

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