msrc | Microsoft Security Response Center

Mitigating NTLM Relay Attacks by Default

Monday, December 09, 2024

Introduction In February 2024, we released an update to Exchange Server which contained a security improvement referenced by CVE-2024-21410 that enabled Extended Protection for Authentication (EPA) by default for new and existing installs of Exchange 2019. While we’re currently unaware of any active threat campaigns involving NTLM relaying attacks against Exchange, we have observed threat actors exploiting this vector in the past.

Announcing the Adaptive Prompt Injection Challenge (LLMail-Inject)

Friday, December 06, 2024

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 LLMail service with a question (e.

Toward greater transparency: Publishing machine-readable CSAF files

Tuesday, November 12, 2024

Welcome to the third installment in our series on transparency at the Microsoft Security Response Center (MSRC). In this ongoing discussion, we talk about our commitment to providing comprehensive vulnerability information to our customers. At MSRC, our mission is to protect our customers, communities, and Microsoft, from current and emerging threats to security and privacy.

Security Update Guide

Announcing the BlueHat 2024 Sessions

Tuesday, October 22, 2024

34 sessions from 54 presenters representing 20 organizations! We are thrilled to reveal the lineup of speakers and presentations for the 23rd BlueHat Security Conference, in Redmond WA from Oct 29-30. This year’s conference continues the BlueHat ethos and Secure Future Initiative mission of “Security Above All Else”. Security researchers and responders from inside and outside of Microsoft will gather on the Microsoft campus in Redmond, WA to share, debate, and challenge each other, with the shared goal of creating a safer and more secure world for all.

BlueHat

Announcing BlueHat 2024: Call for Papers now open

Wednesday, August 07, 2024

The 23rd edition of Microsoft’s BlueHat security conference will be hosted by the Microsoft Security Response Center (MSRC) at the Redmond, WA corporate campus, October 29 and 30, 2024. BlueHat brings together security researchers and responders from both inside and outside of Microsoft, who come together as peers to exchange ideas, experiences, and best practices, all in the interest of creating a safer and more secure world for everyone.

Congratulations to the MSRC 2024 Most Valuable Security Researchers!

Tuesday, August 06, 2024

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 excited to recognize this year’s 100 Most Valuable Researchers (MVRs), based on the total number of points earned for each valid report.

Microsoft Bounty Program Year in Review: $16.6M in Rewards

Monday, August 05, 2024

We are excited to announce that this year the Microsoft Bounty Program has awarded $16.6M in bounty awards to 343 security researchers from 55 countries, securing Microsoft customers in partnership with the Microsoft Security Response Center (MSRC). Each year we identify over a thousand potential security issues together, safeguarding our customers from possible threats through the Microsoft Bounty Program.

Introducing the MSRC Researcher Resource Center

Wednesday, July 31, 2024

Microsoft partners with the global security researcher community to surface and report security vulnerabilities to protect all users of Microsoft products and services. Researcher submissions help us address immediate threats while also identifying trends and insights to holistically improve the security of our products and services. We’re always looking for ways to build upon this partnership, and with that goal in mind, we are excited to announce the creation of the MSRC Researcher Resource Center.

Security Researcher

Announcing the CVRF API 3.0 upgrade

Thursday, July 11, 2024

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 brings improvements in both security and performance, without requiring any changes to your existing invocation methods.

What’s new in the MSRC Report Abuse Portal and API

Wednesday, July 03, 2024

The Microsoft Security Response Center (MSRC) has always been at the forefront of addressing cyber threats, privacy issues, and abuse arising from Microsoft Online Services. Building on our commitment, we have introduced several updates to the Report Abuse Portal and API, which will significantly improve the way we handle and respond to abuse reports.