Microsoft Security Response Center

The Microsoft Security Response Center (MSRC) identifies, monitors, responds to and resolves security incidents and vulnerabilities in Microsoft software.

Microsoft Security Response Center

  • Out-of-Band Release to Address Microsoft Security Advisory 2963983

    At approximately 10 a.m. PDT, we will release an out-of-band security update to address the issue affecting Internet Explorer (IE) that was first discussed in Security Advisory 2963983. This update is fully tested and ready for release for all affected versions of the browser. The majority of customers have automatic updates enabled and will not need to take any action because protections will be downloaded and installed automatically. If you’re unsure if you have automatic updates, or you...
  • Evolving Microsoft's Advance Notification Service in 2015

    Our Advance Notification Service (ANS) was created more than a decade ago as part of Update Tuesday to broadly communicate in advance, about the security updates being released for Microsoft products and services each month. Over the years, technology environments and customer needs have evolved, prompting us to evaluate our existing information and distribution channels. This desire to improve is why customers may have seen us introduce myBulletins to provide bulletin reports tailored to customer preferences, discontinue the Deployment Priority matrix in favor of the Exploitability Index, modify the Exploitability Index to account for more threat scenarios, simplify security bulletin content to help customer understanding, and create a centralized glossary for bulletin definitions. The change being announced today fits within that context...

  • A Call for Better Coordinated Vulnerability Disclosure

    For years our customers have been in the trenches against cyberattacks in an increasingly complex digital landscape. We’ve been there with you, as have others. And we aren’t going anywhere.  Forces often seek to undermine and disrupt technology and people, attempting to weaken the very devices and services people have come to depend on and trust. Just as malicious acts are planned, so too are counter-measures implemented by companies like Microsoft. These efforts aim to protect everyone against a broad spectrum of activity ranging from phishing scams that focus on socially engineered trickery, to sophisticated attacks by persistent and determined adversaries. (And yes, people have a role to play – strong passwords, good policies and practices, keeping current to the best of your ability, detection and response, etc. But we’ll save those topics for another day).     

    With all that is going on, this is a time for security researchers and software companies to come together and not stand divided over important protection strategies, such as the disclosure of vulnerabilities and the remediation of them.. 

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  • Out-of-band release for Security Bulletin MS14-068

    On Tuesday, November 18, 2014, at approximately 10 a.m. PST, we will release an out-of-band security update to address a vulnerability in Windows....

  • Security Advisory 3009008 updated

    Today, we announced the availability of SSL 3.0 fallback warnings in Internet Explorer (IE) 11. For more information please visit the IE blog . We have also published an update on the status of the changes we have made to our Azure offerings in response to the SSL 3.0 vulnerability. For more information please visit the Azure blog . Tracey Pretorius Director, Response Communications UPDATE October 29, 2014: Today, we revised Security Advisory 3009008 to provide an easy, one-click...
  • Microsoft releases Security Advisory 2963983

    Today, we released Security Advisory 2963983 regarding an issue that impacts Internet Explorer. At this time, we are only aware of limited, targeted attacks. This issue allows remote code execution if users visit a malicious website with an affected browser. This would typically occur by an attacker convincing someone to click a link in an email or instant message. Our initial investigation has revealed that Enhanced Protected Mode, on by default for the modern browsing experience in Internet...
  • The September 2014 Security Updates

    Today, as a part of our regular Update Tuesday process, we released four security bulletins – one rated Critical and three rated Important in severity – to address 42 Common Vulnerabilities & Exposures (CVEs) in Microsoft Windows, Internet Explorer, .NET Framework, and Lync Server. We encourage you to apply all of these updates, but for those who need to prioritize, we recommend focusing on the Critical update first. Below is a graphical overview of this release and a brief video...
  • November 2014 Updates

    Today, as part of Update Tuesday, we released 14 security updates – four rated Critical, nine rated Important, and two rated Moderate, to address 33 Common Vulnerabilities and Exposures (CVEs) in Microsoft Windows, Internet Explorer (IE), Office, .NET Framework, Internet Information Services (IIS), Remote Desktop Protocol (RDP), Active Directory Federation Services (ADFS), Input Method Editor (IME) (Japanese), and Kernel Mode Driver (KMD). We encourage you to apply all of these updates, but...
  • Security Bulletin MS14-045 rereleased

    Every month for many years, we’ve released a number of updates focused on the continuous improvement of customers’ experiences with our technology. Historically, these updates happened at different times during the month, with the security-specific ones occurring on the second Tuesday of each month. Recently, to further streamline, we decided to include more of our non-security updates together with our security updates and begin the global release to customers on the second Tuesday of each month...

  • Security Bulletin MS14-068 released

    Today, we released an out-of-band security update to address a vulnerability in Kerberos which could allow Elevation of Privilege. This update is for all supported versions...