Changes to Security Update Links

Updates have historically been published on both the Microsoft Download Center and the Microsoft Update Catalog and Security Bulletins linked directly to update packages on the Microsoft Download Center. Some updates will no longer be available from the Microsoft Download Center. Security bulleti...

Enhanced Mitigation Experience Toolkit (EMET) version 5.5 is now available

The Enhanced Mitigation Experience Toolkit EMET benefits enterprises and all computer users by helping to protect against security threats and breaches that can disrupt businesses and daily lives. It does this by anticipating, diverting, terminating, blocking, or otherwise invalidating the most...

April 2015 Updates

Today, as part of Update Tuesday, we released 11 security bulletins. We encourage customers to apply all of these updates. For more information about this month’s security updates, including the detailed view of the Exploitability Index XI, visit the Microsoft Bulletin Summary webpage. If you are...

Security Advisory 3046015 released

Today, we released Security Advisory 3046015 to provide guidance to customers in response to the SSL/TLS issue referred to by researchers as “FREAK” Factoring attack on RSA-EXPORT Keys. Our investigation continues and we’ll take the necessary steps to protect our customers. MSRC Team...

Bug Bounty Evolution: Online Services

Today marks the next evolution in bounty programs at Microsoft as we launch the Microsoft Online Services Bug Bounty program starting with Office 365. In our mobile first, cloud first world, this is an exciting and logical evolution to our existing bug bounty programs. Office 365 is the first of...

Security Advisory 2982792 released, Certificate Trust List updated

Today, we are updating the Certificate Trust List CTL for all supported releases of Microsoft Windows to remove the trust of mis-issued third-party digital certificates. These certificates could be used to spoof content and perform phishing or man-in-the-middle attacks against web properties. Wit...

Theoretical Thinking and the June 2014 Bulletin Release

As security professionals, we are trained to think in worst-case scenarios. We run through the land of the theoretical, chasing “what if” scenarios as though they are lightning bugs to be gathered and stashed in a glass jar. Most of time, this type of thinking is absolutely the correct thing for...

Continuing with Our Community Driven, Customer Focused Approach for EMET

The Enhanced Mitigation Experience Toolkit, best known as EMET, helps raise the bar against attackers gaining access to computer systems. Since the first release of EMET in 2009, our customers and the security community have adopted EMET and provided us with valuable feedback. Feedback both in...

When ASLR makes the difference

We wrote several times in this blog about the importance of enabling Address Space Layout Randomization mitigation ASLR in modern software because it’s a very important defense mechanism that can increase the cost of writing exploits for attackers and in some cases prevent reliable exploitation. ...

Advance Notification Service for December 2013 Security Bulletin Release

Today we’re providing advance notification for the release of 11 bulletins, five Critical and six Important, for December 2013. The Critical updates address vulnerabilities in Internet Explorer, Windows, Microsoft Exchange and GDI+. The Critical update for GDI+ fully addresses the publicly...

When nothing worked, Artem Shymshyrian kept going

If you had asked Artem Shymshyrian years ago whether he would become a security researcher, the answer would have been far from certain...

Machine Learning Security Evasion Competition 2020 Invites Researchers to Defend and Attack

Machine learning ML is an increasingly valuable tool in cyber security as adversaries continually evolve their tactics and techniques to evade detection. As machine learning has advanced and sophisticated ML models have been developed to assist security professionals in protecting the cloud,...

Recognizing Security Researchers in 2020

Is it too early to talk about the 2020 MSRC Most Valuable Security Researchers? Five months from now, at the end of June, the program period closes for researchers to be considered for inclusion in the Most Valuable Researchers list. The top researcher list will be revealed at Black Hat North...

Inside the MSRC – Building your own security incident response process

This is the third and last in a series of posts that looks at how Microsoft responds to elevated threats to customers through the Microsoft Security Response Center’s MSRC Software and Services Incident Response Plan SSIRP. Our previous posts discussed how Microsoft protects customers against...

Local privilege escalation via the Windows I/O Manager: a variant finding collaboration

The Microsoft Security Response Center MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services to help make our customers and the global online community more secure. We appreciate the excellent vulnerability research reported to us regularly from the...

January 2019 Security Update Release

Today, we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to turn on automatic updates. More information about this month’s security updates can be found on the Security Update Guide...

Inside MSRC: Sharing Our Story & Customer Tips

For the last 20 years, the Microsoft Security Response Center has been an integral part of Microsoft’s commitment to customer security. We are often called on to talk about the work we do and how customers can apply the lessons we have learned over that period to better their security posture...

Recognizing Q4 Top 5 Bounty Hunters

We have tabulated the results from April-June 2018. The Top 5 Bounty Hunters for Q4 are now in. As with our list from Q3, we want to recognize both the leaders in payouts and in number of successful submissions. We appreciate the hard work and dedication of the following individuals and companies...

March 2018 security update release

Today, we released security updates to provide additional protections against malicious attackers. By default, Windows 10 receives these updates automatically, and for customers running previous versions, we recommend they turn on automatic updates as a best practice. More information about this...

2017 年 6 月のセキュリティ更新プログラム (月例)

2017 年 6 月 14 日 日本時間、マイクロソフトは以下のソフトウェアのセキュリティ更新プログラムを公開しまし...

May 2017 security update release

Today, we released security updates to provide additional protections against malicious attackers. By default, Windows 10 receives these updates automatically, and for customers running previous versions, we recommend they turn on automatic updates as a best practice. More information about this...

December 2016 security update release

Today we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to apply security updates as soon as they are released. More information about this month’s security updates and advisories can be found in the Security...

June 2015 Updates

Today, as part of Update Tuesday, we released 8 security bulletins. We encourage customers to apply all of these updates. For more information about this month’s security updates, including the detailed view of the Exploitability Index XI, visit the Microsoft Bulletin Summary webpage. If you are...

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...

The April 2014 Security Updates

T. S. Elliot once said, “What we call the beginning is often the end. And to make an end is to make a beginning. The end is where we start from.” So as we put one season to bed, let’s start another by looking at the April security updates. Today, we release four bulletins to address 11 CVEs in...

Clarification on Security Advisory 2896666 and the ANS for the November 2013 Security Bulletin Release

Today, we’re providing advance notification for the release of eight bulletins, three Critical and five Important, for November 2013. The Critical updates address vulnerabilities in Internet Explorer and Microsoft Windows, and the Important updates address issues in Windows and Office. While this...

Advance Notification Service for August 2013 Security Bulletin Release

Today we’re providing advance notification for the release of eight bulletins, three Critical and five Important, for August 2013. The Critical updates address vulnerabilities in Microsoft Windows, Internet Explorer and Exchange. As usual, we’ve scheduled the bulletin release for the second Tuesd...

New Bounty Program Details

Today we announced the upcoming Mitigation Bypass Bounty, the BlueHat Bonus for Defense, and the Internet Explorer 11 Preview Bug Bounty program. It’s very exciting to finally take the wraps off of these initiatives and we are anticipating some great submissions from the security research...

Microsoft is sponsoring the Cyber Security Challenge UK

The global adoption of computing continues to draw attackers toward ever-richer targets. The latest data from the Microsoft Security Intelligence Report shows that although industry-wide vulnerability disclosures are down and computer defenses are improved, exploit activity has actually increased...

Anatomy of a Cloud-Service Security Update

Our security teams around the world focus on identifying and mitigating security issues as soon as possible while minimizing customer disruption. One of the challenges of a traditional security update is ensuring customers apply the protections promptly. We recently discussed the work that goes...

Coming Soon: New Security Update Guide Notification System

Sharing information through the Security Update Guide is an important part of our ongoing effort to help customers manage security risks and keep systems protected. Based on your feedback we have been working to make signing up for and receiving Security Update Guide notifications easier. We are...

Researcher Spotlight: Dr. Nestori Syynimaa’s Constant Mission Protecting Identities

"When you find the things I find, they really matter. They affect everybody’s security.” Currently streaming : The Expanse and Lost in Space on Netflix Currently listening to : Amorphis, Architects, and Killswitch Engage Currently running : 130 kilometers or 80 miles a month Currently playing :...

One-Click Microsoft Exchange On-Premises Mitigation Tool - March 2021

We have been actively working with customers through our customer support teams, third-party hosters, and partner network to help them secure their environments and respond to associated threats from the recent Exchange Server on-premises attacks. Based on these engagements we realized that there...

Microsoft Exchange Server Vulnerabilities Mitigations - updated March 15, 2021

Update March 15, 2021: If you have not yet patched, and have not applied the mitigations referenced below, a one-click tool, the Exchange On-premises Mitigation Tool is now our recommended path to mitigate until you can patch. Microsoft previously blogged our strong recommendation that customers...

Congratulations to the MSRC’s 2020 Most Valuable Security Researchers

Today we announce our Most Valuable Security Researchers for 2020! The MSRC Researcher Recognition program is an integral aspect of recognizing the ongoing partnerships with our community of talented security researchers who report through Coordinated Vulnerability Disclosure CVD. These...

Microsoft Announces Top Three Contributing Partners in the Microsoft Active Protections Program (MAPP)

Today Microsoft announced the MAPP program Top Vulnerability Contributors, Top Threat Indicator Submitters, and Top Zero-Day Reporting for the period of July 1, 2018 – June 30, 2019. The Microsoft Active Protections Program provides security and protection to customers through cooperation and...

日本セキュリティチーム ブログ移行のお知らせ

平素より、日本セキュリティチーム ブログをご愛読いただきありがとうございます。 日本セキュリティチーム ブ...

June 2019 security update release

Today, we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to turn on automatic updates. More information about this month’s security updates can be found on the Security Update Guide...

「Emotet」の大規模感染を阻止した人工知能のしくみ

本記事は、Microsoft Secure のブログ “How artificial intelligence stopped an Emotet outbreak” 2018 年 2 月 14 日 米国時間公開...

Windows Defender ATP の機械学習と Antimalware Scan Interface: スクリプトを悪用した「環境寄生型」攻撃の検出

本記事は、Microsoft Secure のブログ “Windows Defender ATP machine learning and AMSI: Unearthing script-based attacks that ‘live off the land’”...

December 2016 security update release

Today we released security updates to provide additional protections against malicious attackers. As a best practice, we encourage customers to apply security updates as soon as they are released. More information about this month’s security updates and advisories can be found in the Security...

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 of Windows Server and includes a defense-in-depth update for all supported versions of Windows. We strongly encourage...

Security Advisory 2953095: recommendation to stay protected and for detections

Today, Microsoft released Security Advisory 2953095 to notify customers of a vulnerability in Microsoft Word. At this time, we are aware of limited, targeted attacks directed at Microsoft Word 2010. This blog will discuss mitigations and temporary defensive strategies that will help customers to...

Assessing risk for the March 2014 security updates

Today we released five security bulletins addressing 23 unique CVE’s. Two bulletins have a maximum severity rating of Critical while the other three have a maximum severity rating of Important. We hope that the table below helps you prioritize the deployment of the updates appropriately for your...

Lovely tokens and the September 2013 security updates

Helen Hunt Jackson famously wrote, “By all lovely tokens September is here, with summer’s best of weather and autumn’s best of cheer.” I share Helen’s clear adoration for this time of year. As a sports fan, there are so many “lovely tokens” to enjoy. The baseball pennant race is heating up, colle...

Are you prepared for the BlueHat Challenge?

Today we are kicking off a new challenge so you can showcase your security prowess and, if we can, help you build some more. Our BlueHat Challenge is a series of computer security questions, which increase in difficulty as you progress. Only the rare and talented engineer will be able to finish t...

Toward greater transparency: Expanding machine-readable Vulnerability Exploitability eXchange (VEX)

Starting today, Microsoft is publishing Vulnerability Exploitability eXchange VEX statements for all Microsoft-assigned CVEs. Building on our work with theCommon Security Advisory Framework CSAFand our previousAzure Linux VEX implementation, this latest milestone in the Microsoft Security Respons...

オンプレミスサーバー製品追加! アプリケーションとオンプレミス サーバーのバグ報奨金プログラムの紹介

本ブログは、On-Premises Servers Products are Here! Introducing the Applications and On-Premises Servers Bug Bounty Program の抄訳版です。最新の情報は原文を参照して...

Congratulating Our Top MSRC 2021 Q1 Security Researchers!

We’re excited to announce the top contributing researchers for the 2021 First Quarter Q1! Congratulations to all the researchers recognized in this quarter’s leaderboard and thank you to everyone who continues to help secure our customers and the...

Azure Sphere Security Research Challenge Now Open

The Azure Sphere Security Research Challenge is an expansion of Azure Security Lab, announced at Black Hat in August 2019. At that time, a select group of talented researchers was invited to come and do their worst, emulating criminal hackers in a customer-safe cloud environment. This new researc...