2017 年 10 月のセキュリティ更新プログラム (月例)

2017/10/17 更新 本日、ADV170016 が廃止され、CVE-2017-13080が 2017 年 10 月のセキュリティ リリ...

Rising star: Meet Dylan, MSRC’s youngest security researcher

At just 13 years old, Dylan became the youngest security researcher to collaborate with the Microsoft Security Response Center MSRC. His journey into cybersecurity is inspiring—rooted in curiosity, resilience, and a deep desire to make a difference. Early beginnings: From scratch to security...

BlueHat 2023: Connecting the security research community with Microsoft

We’re excited to welcome more than 400 members of the security research community from around the world to Redmond, Washington for BlueHat 2023. Hosted by the Microsoft Security Response Center MSRC, BlueHat is where the security research community, and Microsoft security professionals, come...

Additional Guidance Regarding OMI Vulnerabilities within Azure VM Management Extensions

Last updated on October 5, 2021: See revision history located at the end of the post for changes. On September 14, 2021, Microsoft released fixes for three Elevation of Privilege EoP vulnerabilities and one unauthenticated Remote Code Execution RCE vulnerability in the Open Management...

Announcing the Top MSRC 2020 Q3 Security Researchers

Following the MSRC’s 2020 Most Valuable Security Researchers announced during this year’s Black Hat, we’re excited to announce the top contributing researchers for the 2020 Third Quarter Q3! The top three researchers of the 2020 Q3 Security Researcher Leaderboard are: David Dworken 1800 points,...

Announcing the winners of the Adaptive Prompt Injection Challenge (LLMail-Inject)

We are excited to announce the winners of LLMail-Inject, our first Adaptive Prompt Injection Challenge! The challenge ran from December 2024 until February 2025 and was featured as one of the four official competitions of the 3rd IEEE Conference on Secure and Trustworthy Machine Learning IEEE...

BlueHat 2023: Applications to Attend NOW OPEN!

We are excited to announce that applications to attend BlueHat 2023 are now open! BlueHat 2023 will be the 20th version of the BlueHat conference and will once again be on the Microsoft campus in Redmond, WA, USA, from February 8 – 9, 2023. Hosted by the Microsoft Security Response Center MSRC,...

What’s the smallest variety of CHERI?

The Portmeirion project is a collaboration between Microsoft Research Cambridge, Microsoft Security Response Center, and Azure Silicon Engineering & Solutions. Over the past year, we have been exploring how to scale the key ideas from CHERI down to tiny cores on the scale of the cheapest...

July 2020 Security Update: CVE-2020-1350 Vulnerability in Windows Domain Name System (DNS) Server

Today we released an update for CVE-2020-1350, a Critical Remote Code Execution RCE vulnerability in Windows DNS Server that is classified as a ‘wormable’ vulnerability and has a CVSS base score of 10.0. This issue results from a flaw in Microsoft’s DNS server role implementation and affects all...

January 2020 security updates are available!

We have released the January 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 in the Security Update Guide. As a reminder,...

January 2020 Security Updates: CVE-2020-0601

The January security updates include several Important and Critical security updates. As always, we recommend that customers update their systems as quickly as practical. Details for the full set of updates released today can be found in the Security Update Guide. We believe in Coordinated...

BlueHat 2023 Call for Papers is Now Open!

For nearly 20 years, BlueHat has been where the security research community, and Microsoft security professionals come together as peers, to share, debate, challenge, learn, and exchange ideas in the interest of creating a safer and more secure world for all. We are extremely excited to announce...

Azure Database for PostgreSQL Flexible Server Privilege Escalation and Remote Code Execution

MSRC was informed by Wiz, a cloud security vendor, under Coordinated Vulnerability Disclosure CVD of an issue with the Azure Database for PostgreSQL Flexible Server that could result in unauthorized cross-account database access in a region. By exploiting an elevated permissions bug in the Flexib...

December 2018 Security Update Release

Today, we released a security update for Internet Explorer after receiving a report from Google about a new vulnerability being used in targeted attacks. Customers who have Windows Update enabled and have applied the latest security updates, are protected automatically. We encourage customers to...

2018 年 12 月のセキュリティ更新プログラム (月例)

2018/12/20 更新: 新たに定例外で公開した Internet Explorer の脆弱性 CVE-2018-8653 の情報を追加しました。 2018 年 12 月 12 日 日本時間、マイクロ...

2018 年 11 月のセキュリティ更新プログラム (月例)

2019/2/14 更新: お知らせ Microsoft Dynamics 365 の脆弱性 CVE-2018-8654 の詳細ページを公開しました。脆弱性に対応するための更新プログラム...

INTERN(al) MSRC variant hunting: From multi-tenant authorization to Model Context Protocol

When security researchers submit a vulnerability report to MSRC, the Vulnerabilities and Mitigations V&M team reviews it, reproduces the issue, and determines severity. The team reviews all submissions from internal and external security researchers...

Azure Kubernetes Service (AKS) Threat Hunting

As more businesses shift away from running workloads on dedicated virtual machines to running them inside containers using workload orchestrators like Kubernetes, adversaries have become more interested in them as targets. Moreover, the benefits Kubernetes provides for managing workloads are also...

Microsoft Investigation – Threat actor consent phishing campaign abusing the verified publisher process

Summary On December 15th, 2022, Microsoft became aware of a consent phishing campaign involving threat actors fraudulently impersonating legitimate companies when enrolling in the Microsoft Cloud Partner Program MCPP formerly known as Microsoft Partner Network MPN. The actor used fraudulent partn...

Vulnerability Fixed in Azure Synapse Spark

Summary Summary Microsoft takes a proactive approach to continually probe our defenses, hunt for vulnerabilities, and seek new, innovative ways to protect our customers. Security researchers are an important part of this effort, and our collaborative partnership is critical in a world where...

New Research Paper: Pre-hijacking Attacks on Web User Accounts

In 2020, MSRC awarded two Identity Project Research Grants to support external researchers working to further strengthen the security of identity protocols and systems. Today we are pleased to release the results of the first of these projects. This research, led by independent security researche...

Anatomy of a Security Update

The Microsoft Security Response Center is part of the defender community and on the front line of security response for our customers and the company. Our mission is to protect customers and Microsoft from current and emerging threats related to security and privacy. We monitor threats and provid...

March 2020 security updates are available

We have released the March 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 in the Security Update Guide. The post March 2020...

ActiveX Control issue being addressed in Update Tuesday

Late last Friday, November 8, 2013, a vulnerability, CVE-2013-3918, affecting an Internet Explorer ActiveX Control was publically disclosed. We have confirmed that this vulnerability is an issue already scheduled to be addressed in “Bulletin 3”, which will be released as MS13-090, as listed in th...

MS13-080 addresses two vulnerabilities under limited, targeted attacks

Today we released MS13-080 which addresses nine CVEs in Internet Explorer. This bulletin fixes multiple security issues, including two critical vulnerabilities that haven been actively exploited in limited targeted attacks, which we will discuss in details in this blog entry. CVE-2013-3893: the...

Customer guidance for SharePoint vulnerability CVE-2025-53770

Revision Change Date 1.0 Information published 07/19/25 2.0 Clarified affected SharePoint product in summary 07/20/25 Added fix availability guidance Provided additional protections guidance regarding: Upgrade SharePoint products to supported versions if required Install July 2025 Security Update...

Microsoft mitigates China-based threat actor Storm-0558 targeting of customer email

UPDATE: Microsoft performed a comprehensive technical investigation into the acquisition of the Microsoft account consumer signing key, including how it was used to access enterprise email. Our technical investigation has concluded, and on September 6, 2023, we published our investigation finding...

Microsoft Investigation - Threat actor consent phishing campaign abusing the verified publisher process

Summary Summary On December 15th, 2022, Microsoft became aware of a consent phishing campaign involving threat actors fraudulently impersonating legitimate companies when enrolling in the Microsoft Cloud Partner Program MCPP formerly known as Microsoft Partner Network MPN. The actor used fraudule...

Security Update Guide Improvement – Representing Hotpatch Updates

Today we are updating the way Microsoft Security Update Guide SUG represents the Windows Hotpatch feature to make it easier for users to identify the hotpatch and security updates. Hotpatching was introduced a year ago as a new way to install updates on supported Windows Server Azure Edition...

Azure Database for PostgreSQL Flexible Server Privilege Escalation and Remote Code Execution

MSRC was informed by Wiz, a cloud security vendor, under Coordinated Vulnerability Disclosure CVD of an issue with the Azure Database for PostgreSQL Flexible Server that could result in unauthorized cross-account database access in a region. By exploiting an elevated permissions bug in the Flexib...

Increasing Representation of Women in Security Research

Microsoft is committed to partnering with and supporting women in security research. Whether it’s growing women early in their career, or connecting people with mentors, we want to be a part of the journey. Throughout Womens History Month we intentionally sought opportunities to engage with women...

2021 年 9 月のセキュリティ更新プログラム (月例)

更新 9 月 17 日： 9 月の月例セキュリティ更新日に公開した Open Management Infrastructure OMI の脆弱性 CVE-2021-38645, CVE-2021-38649, CVE-2021-38648, CVE-2021-38647 に関して、追加のガイダン...

Announcing the Launch of the Azure SSRF Security Research Challenge

Microsoft is excited to announce the launch of a new, three-month security research challenge under the Azure Security Lab initiative. The Azure Server-Side Request Forgery SSRF Research Challenge invites security researchers to discover and share high impact SSRF vulnerabilities in Microsoft...

Solving Uninitialized Kernel Pool Memory on Windows

This blog post outlines the work that Microsoft is doing to eliminate uninitialized kernel pool memory vulnerabilities from Windows and why we’re on this path. For a background on why uninitialized memory matters and what options have been used in the past to tackle this issue, please see our...

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...

Announcing the Adaptive Prompt Injection Challenge (LLMail-Inject)

We are excited to introduce LLMail-Inject, a new challenge focused on evaluating state-of-the-art prompt injection defenses in a realistic simulated LLM-integrated email client. In this challenge, participants assume the role of an attacker who sends an email to a user. The user then queries the...

Announcing the CVRF API 3.0 upgrade

At the Microsoft Security Response Center, we are committed to continuously improving the security and performance of our services to meet the evolving needs of our customers. We are excited to announce the rollout of the latest version of our Common Vulnerability Reporting CVRF API. This update...

Hunting for Cobalt Strike: Mining and plotting for fun and profit

Introduction Introduction Cobalt Strike is a commercial Command and Control framework built by Helpsystems. You can find out more about Cobalt Strike on the MITRE ATT&CK page. But it can also be used by real adversaries. In this post we describe how to use RiskIQ and other Microsoft technologies ...

Mitigation for Azure Storage SDK Client-Side Encryption Padding Oracle Vulnerability

Summary Google informed Microsoft under Coordinated Vulnerability Disclosure CVD of a padding oracle vulnerability that may affect customers using Azure Storage SDK for Python, .NET, Java client-side encryption CVE-2022-30187. To mitigate this vulnerability, we released a new General Availability...

Windows DNS サーバーの脆弱性情報 CVE-2020-1350 に関する注意喚起

本記事は、「July 2020 Security Update: CVE-2020-1350 Vulnerability in Windows Domain Name System DNS Server」の日本語抄訳です。 本日、脆弱性情報 CVE-2020-1350 を公開し...

Announcing the Xbox Bounty program

Announcing the new Xbox Bounty. The Xbox bounty program invites gamers, security researchers, and technologists around the world to help identify security vulnerabilities in the Xbox network and services, and share them with the Microsoft Xbox team through Coordinated Vulnerability Disclosure CVD...

日本セキュリティチーム ブログ移行のお知らせ

日本セキュリティチーム ブログが、新しいプラットフォームに移行してアドレスが変更になりました。旧アドレス https://blogs.technet.microsoft.com/jpsecurity/ をブラウザのお気に入りに登録や、RSS フィードの登録等で利用されている方は、お手数ですが、新たなアドレス https://aka.ms/jpsecurity へ変更をお願いします。...

BlueHat Shanghai 2019 Call for Papers is Now Open!

We know security experts with diverse skills and experiences are found around the world. This year, the BlueHat Security Conference is coming to Shanghai! BlueHat Shanghai 2019 will take place on May 29-30 at W Shanghai - The Bund. We want to provide a venue for security researchers to come...

Microsoft Joins Open Source Security Foundation

Microsoft has invested in the security of open source software for many years and today I’m excited to share that Microsoft is joining industry partners to create the Open Source Security Foundation OpenSSF, a new cross-industry collaboration hosted at the Linux Foundation. The OpenSSF brings...

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...

May 2018 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. MSRC team...

Fix it tool available to block Internet Explorer attacks leveraging CVE-2014-0322

Today, we released Security Advisory 2934088 to provide guidance to customers concerned about a new vulnerability found in Internet Explorer versions 9 and 10. This vulnerability has been exploited in limited, targeted attacks against Internet Explorer 10 users browsing to www.vfw.org and...

BlueHat October 2023 Call for Papers is Now Open!

As you may have seen on social media, the next BlueHat conference will be October 11 – 12, 2023, on Microsoft’s Redmond campus in Washington state, USA. The Call for Papers CFP is now open through August 18, 2023. The BlueHat community is a unique blend of security researchers and responders from...

New MSRC Blog Site

We are excited to announce the release of the new Microsoft Security Response Center MSRC blog site. Please visit msrc.microsoft.com/blog/starting February 9th, 2023, for all past and future MSRC blog content. In addition to the new URL, we have refreshed the site with a new look and improved sit...

Publishing CBL-Mariner CVEs on the Security Update Guide CVRF API

Microsoft is pleased to announce that beginning January 11, 2023, we will publish CBL-Mariner CVEs in the Security Update Guide SUG Common Vulnerability Reporting Framework CVRF API. CBL-Mariner is a Linux distribution built by Microsoft to power Azure’s cloud and edge products and services and i...