Severity Rating: Important
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow denial of service if an attacker sends a specially crafted HTTP packet to a target system.

Severity Rating: Important
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an authenticated attacker on a guest operating system runs a specially crafted application that causes the Hyper-V host operating system to execute arbitrary code. Customers who have not enabled the Hyper-V role are not affected.

Severity Rating: Important
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft .NET Framework. The more severe of the vulnerabilities could cause remote code execution if an attacker with access to the local system executes a malicious application.

Severity Rating: Critical
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Windows, Microsoft .NET Framework, Microsoft Office, Skype for Business, and Microsoft Lync. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted document or visits a webpage that contains specially crafted embedded fonts.

Severity Rating: Critical
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user clicks a specially crafted link that could allow an attacker to run malicious code remotely to take control of the user’s system. However, in all cases an attacker would have no way to force a user to click a specially crafted link. An attacker would have to convince a user to click the link, typically by way of an enticement in an email or Instant Messenger message.

Severity Rating: Critical
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Adobe Flash Player when installed on all supported editions of Windows 8.1, Windows Server 2012, Windows Server 2012 R2, Windows RT 8.1, and Windows 10.

Severity Rating: Important
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if Windows OLE fails to properly validate user input. An attacker could exploit the vulnerability to execute malicious code. However, an attacker must first convince a user to open either a specially crafted file or a program from either a webpage or an email message.

Revision Note: V1.0 (April 12, 2016): Click here to enter text.
Summary: This bulletin summary lists security bulletins released for April 2016.

Severity Rating: Important
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow security feature bypass if an attacker logs on to a target system and runs a specially crafted application.

Revision Note: V1.0 (April 12, 2016): Advisory published.
Summary: Microsoft is announcing the availability of an update to improve input filtering for certain Microsoft wireless mouse devices. The update enhances security by filtering out QWERTY key packets in keystroke communications issued from receiving USB wireless dongles to wireless mouse devices. This improvement is part of ongoing efforts to improve the effectiveness of security in Windows and Microsoft devices. For more information, see Microsoft Knowledge Base Article 3152550.