Windows 8.1

Microsoft continues to issue a large number of security updates for versions of Windows and other software products on the second Tuesday of each month, otherwise known as "Patch Tuesday." Today was no different as the company issued 13 security bulletins, three of which were labeled as critical and affect all versions of Windows, including Windows 7, Windows 8.1 and the Windows 10 preview.

One of the three critical bulletins, MS15-043, is a cumulative security update for Internet Explorer that fixed a number of exploits. Microsoft says, "The most severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer." The second critical update, MS15-044, deals with exploits in Microsoft's font drivers. The company said, "The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted document or visits an untrusted webpage that contains embedded TrueType fonts."

Finally, the third bulletin labeled as "critical", MS15-045, fixes an issue in Windows Journal. Microsoft said, "The vulnerabilities could allow remote code execution if a user opens a specially crafted Journal file. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights."

Source: Microsoft