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.

Severity Rating: Critical
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Internet Explorer. The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

Severity Rating: Important
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves a vulnerability in Microsoft Windows. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator.

Severity Rating: Critical
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Edge. The vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Microsoft Edge. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

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 elevation of privilege if an attacker launches a man-in-the-middle (MiTM) attack. An attacker could then force a downgrade of the authentication level of the SAM and LSAD channels and impersonate an authenticated user.

Severity Rating: Critical
Revision Note: V1.0 (April 12, 2016): Bulletin published.
Summary: This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

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.