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Extending the Microsoft Edge Bounty Program
Over the past ten months we have paid out over $200,000 USD in bounties. This collaboration with the research community has resulted in significant improvements in Edge security and has allowed us to offer more proactive security for our customers. Keeping in line with our philosophy of protectin...
Tales from the MSRC: from pixels to POC
Is this thing still on? It’s been a while since we’ve posted to this blog and we think it’s time to start posting deep technical content about Security Research & Defense SRD again. For readers who are new or may have forgotten, this blog is the home of the MSRC Vulnerabilities & Mitigations...
Taking your feedback on the Security Update Guide
The Security Update Guide has been in public preview since November 2016. This month marked our first release when security update information was published entirely in the new format. Over the last few months, customers and partners have provided a lot of feedback on the direction and...
November 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...
October 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 Engineering Evolution in Office 2016 for Mac
Security is a critical component in all our products at Microsoft. An emphasis on strong security starts at the beginning of all our work, including threat modelling as part of the design process and the consideration of Apple’s own security recommendations for our products on Apple’s platforms. ...
Microsoft Bounty Program expansion - .NET Core and ASP.NET RC2 Beta Bounty
Today I have another exciting expansion of the Microsoft Bounty Program. Please visit https://aka.ms/BugBounty to find out more. As we approach release for .NET Core and ASP.NET, we would like to get even more feedback from the security research community. We are offering a bounty on the .NET Cor...
November 2015 Security Update Release Summary
Today we released security updates to provide 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 TechNet Librar...
October 2015 Security Update Release Summary
Today we released security updates to provide 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 TechNet Librar...
Security Update Solution Further Protects Customer Devices
On Tuesday, August 18, 2015, Microsoft released a security update solution to address a vulnerability. The update is for all supported versions of Internet Explorer. We recommend customers to apply this update as soon as possible by following the directions on the TechNet.com/Security website, in...
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,...
December 2014 Updates
Today, as part of Update Tuesday, we released seven security updates – three rated Critical and four rated Important in severity, to address 24 unique Common Vulnerabilities and Exposures CVEs in Microsoft Windows, Internet Explorer IE, Office and Exchange. We encourage you to apply all of these...
October 2014 Updates
Today, as part of Update Tuesday, we released eight securityupdates – three rated Critical and five rated Important - to address 24 Common Vulnerabilities & Exposures CVEs in Windows, Office, .NET Framework, .ASP.NET, and Internet Explorer IE. We encourage you to apply all of these updates, but f...
June 2014 Security Bulletin Webcast and Q&A
Today we published the June 2014 Security Bulletin webcast questions and answers page along with the webcast replay. We answered six questions on air, with the majority focusing on the updates for TCP and Internet Explorer. The transcript also includes a question we did not have time to answer on...
Meet myBulletins: an online security bulletin customization service
Microsoft is committed to promoting a safer, more trusted Internet and providing monthly security updates is one of the ways our customers keep their devices and connections to the Internet more secure. Packaging updates together into a monthly bulletin cycle stems from customer feedback and offe...
Security Update Released to Address Recent Internet Explorer Vulnerability
Today, we released a security update to address the Internet Explorer IE vulnerability first described in Security Advisory 2963983. This security update addresses every version of Internet Explorer. While we’ve seen only a limited number of targeted attacks, customers are advised to install this...
The March 2014 Security Updates
This month we release five bulletins to address 23 unique CVEs in Microsoft Windows, Internet Explorer and Silverlight. If you need to prioritize, the update for Internet Explorer addresses the issue first described in Security Advisory 2934088, so it should be at the top of your list. While that...
Advance Notification Service for the March 2014 Security Bulletin Release
Today we provide advance notification for the release of five bulletins for March 2014, two rated Critical and thee rated Important in severity. These updates address issues in Microsoft Windows, Internet Explorer and Silverlight. The update provided in MS14-012 fully addresses the issue first...
Announcing EMET 5.0 Technical Preview
Today, we are thrilled to announce a preview release of the next version of the Enhanced Mitigation Experience Toolkit, better known as EMET. You can download EMET 5.0 Technical Preview here. This Technical Preview introduces new features and enhancements that we expect to be key components of th...
Software defense: mitigating common exploitation techniques
In our previous posts in this series, we described various mitigation improvements that attempt to prevent the exploitation of specific classes of memory safety vulnerabilities such as those that involve stack corruption, heap corruption, and unsafe list management and reference count...
Microsoft Releases Security Advisory 2896666
Today we released Security Advisory 2896666 regarding an issue that affects customers using Microsoft Windows Vista and Windows Server 2008, Microsoft Office 2003 through 2010, and all supported versions of Microsoft Lync. We are aware of targeted attacks, largely in the Middle East and South Asi...
Bounty Evolution: $100,000 for New Mitigation Bypass Techniques Wanted Dead or Alive
Those who know me personally or follow me on Twitter are familiar with my obsession with karaoke. I do it as often as I can rope people into going with me, never forcing anyone to sing, though invariably everyone does – or at least sings from the sidelines to the songs they know...
10 years of Update Tuesdays
On October 1, 2003, Microsoft announced it would move to a monthly security bulletin cadence. Today, marks 10 years since that first monthly security update. We looked at many ways to improve our security preparedness and patch timing was the number one customer request. Your feedback was clear a...
Congratulations to James Forshaw Recipient of Our First $100,000 Bounty for New Mitigation Bypass Techniques!
Congratulations to James Forshaw for coming up with a new exploitation technique to get our first ever $100,000 bounty. A security vulnerability researcher with Context Information Security, James already came in hot with design level bugs he found during the IE11 Preview Bug Bounty, and we’re...
Bounty News Update: Bountiful Harvest
Fall is a season traditionally associated with a harvest after planting the seeds and tending the crops. Today I’m proud to announce the names of six very smart people who have helped us make our products more secure by participating in our new bounty programs. When we launched our bounty program...
Software Defense Series: Exploit mitigation and vulnerability detection
Software Defense is a broad topic requiring a multipronged approach including: - the processes and tooling associated with secure development that we try and encapsulate within the Microsoft SDL, - core OS countermeasures that make exploitation of a given vulnerability more difficult for an...
Advance Notification Service for September 2013 Security Bulletin Release
In celebration of kids heading back to school, today we’re providing advance notification for the release of 14 bulletins, four Critical and 10 Important, for September 2013. The Critical updates address issues in Internet Explorer, Outlook, SharePoint and Windows. As always, we’ve scheduled the...
August 2013 Security Bulletin Webcast, Q&A, and Slide Deck
Today we’re publishing the August 2013 Security Bulletin Webcast Questions & Answers page. We fielded 13 questions on various topics during the webcast, with specific bulletin questions focusing primarily on Exchange Server MS13-061 and Windows Kernel MS13-063. There were 3 additional questions...
Cryptographic Improvements in Microsoft Windows
You might remember that in June 2013 we released Security Advisory 2854544 announcing additional options for enterprise customers to manage their digital certificate handling configuration on the Windows platform. The particular functionality announced in Security Advisory 2854544 was first built...
From first report to MVR: Harun’s path in cloud security research
Harun’s relationship with technology began early, driven by curiosity rather than obligation. While still in high school, he taught himself Pascal and C simply because he wanted to understand how things worked. Those languages never became central to his professional career, but they shaped how h...
Congratulations to the top MSRC 2026 Q1 security researchers!
Congratulations to all the researchers recognized in this quarter’sMicrosoft Researcher Recognition Programleaderboard! Thank you to everyone for your hard work and continued partnership to secure customers...
Fixing the script: Journey to reduce XSS exposure
Cross‑site scripting XSS remains one of the most frequently reported web vulnerabilities—not because developers are unaware of it, but because many deployed mitigations address symptoms rather than root causes. Across vulnerability reports and incident response investigations, both within Microso...
Defense-in-Depth Updates for Azure Identity libraries and Azure Key Vault libraries within Azure SDK plus Best Practice Implementation Guidance
Summary Summary Today, Microsoft released new versions of the Azure Key Vault libraries and Azure Identity libraries as part of the Azure Software Development Kit SDK that includes defense-in-depth feature improvements. We also published best practice guidance to help protect applications and...
Exploring a New Class of Kernel Exploit Primitive
The security landscape is dynamic, changing often and as a result, attack surfaces evolve. MSRC receives a wide variety of cases spanning different products, bug types and exploit primitives. One particularly interesting primitive we see is an arbitrary kernel pointer read. These often happen whe...
Expanding the Microsoft Researcher Recognition Program
The Microsoft Researcher Recognition Program offers public thanks and recognition to security researchers who help protect our customers through discovering and sharing security vulnerabilities under Coordinated Vulnerability Disclosure. Today, we are expanding the program to recognize more...
BlueHat is Back!
After a short hiatus, BlueHat is coming back with a vengeance! And we’ve got big plans for the entire researcher community. But first, I must apologize. It’s been a while since you have heard from us. We didn’t have BlueHat 2020 or 2021, and we know that was disappointing. It was partly due to th...
Congratulations to the Top MSRC 2021 Q3 Security Researchers!
Congratulations to all the researchers recognized in this quarter’s MSRC Researcher Recognition Program leaderboard! Thank you to everyone for your hard work and continued partnership to secure customers. The top three researchers of the 2021 Q3 Security Researcher Leaderboard are: BugHunter010 8...
2021 年 10 月のセキュリティ更新プログラム (月例)
2021 年 10 月 13 日 日本時間、マイクロソフトは、マイクロソフト製品に影響する脆弱性を修正するために、セキ...
Security Update Validation Program (SUVP) に関するよくあるお問い合わせ
本記事は「Security Update Validation Program: the early bird tests the worm」の日本語抄訳です。 Security Update Validation Program SUVP、セキュリテ...
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...
A new experience for reporting copyright or trademark infringement on Microsoft Services
The Notice of Copyright or Trademark Infringement Portal has helped protect Microsofts users and customers from intellectual property infringement across online services like Microsoft Azure, Office, Outlook, Skype, Stream, Microsoft News, Sway, Hotmail, NuGet, and Yammer. Microsofts response to...
Continuing to Listen: Good News about the Security Update Guide API!
Based on user feedback we have simplified programmatic access to the security update data by removing the authentication and API-Key requirements when using the CVRF API. You will no longer have to log in to obtain a personal API key to access the data. We're happy to make this valuable public...
New and Improved Report Abuse Portal and API!
The Report Abuse CERT Portal and Report Abuse API have played a significant role in MSRC’s response to suspected cyberattacks, privacy issues, and abuse originating from Microsoft Online Services. With the contributions from our wonderful community of reporters, we continue to gain insightful...
Nobelium Resource Center - updated March 4, 2021
UPDATE: Microsoft continues to work with partners and customers to expand our knowledge of the threat actor behind the nation-state cyberattacks that compromised the supply chain of SolarWinds and impacted multiple other organizations. Microsoft previously used ‘Solorigate’ as the primary...
Security Analysis of CHERI ISA
Is it possible to get to a state where memory safety issues would be deterministically mitigated? Our quest to mitigate memory corruption vulnerabilities led us to examine CHERI Capability Hardware Enhanced RISC Instructions, which provides memory protection features against many exploited...
New and improved Security Update Guide!
We’re excited to announce a significant update to the Security Update Guide, our one-stop site for information about all security updates provided by Microsoft. This new version will provide a more intuitive user experience to help protect our customers regardless of what Microsoft products or...
New and improved Security Update Guide!
We’re excited to announce a significant update to the Security Update Guide, our one-stop site for information about all security updates provided by Microsoft. This new version will provide a more intuitive user experience to help protect our customers regardless of what Microsoft products or...
Microsoft Bug Bounty Programs Year in Review: $13.7M in Rewards
Security researchers are a vital component of the cybersecurity ecosystem that safeguards every facet of digital life and commerce. The researchers who devote time to uncovering and reporting security issues before adversaries can exploit them have earned our collective respect and gratitude. The...
Top MSRC 2020 Q2 Security Researchers Announced – Congratulations!
We are excited to announce the top contributing researchers for the 2020 Second Quarter Q2! Congratulations to all the researchers who continue to rock the leaderboard, and a big thank you to everyone for your contribution to securing our customers and the ecosystem. The top three researchers of...
The Safety Boat: Kubernetes and Rust
Our team, DeisLabs, recently released a new piece of software called Krustlet, which is a tool for running WebAssembly modules on the popular, open-source container management tool called Kubernetes. Kubernetes is used quite extensively to run cloud software across many vendors and companies and ...