The next chapter of the Microsoft Security Response Center’s (MSRC) BlueHat security conference is fast approaching. BlueHat Asia 2025 will take place in Bengaluru, India, on November 5 – 6, 2025 and the Call for Papers is now open. Submissions…
Category: Microsoft Security Response Center
postMessaged and Compromised
At Microsoft, securing the ecosystem means more than just fixing bugs—it means proactively hunting for variant classes, identifying systemic weaknesses, and working across teams to protect customers before attackers ever get the chance. This blog highlights one such effort: a…
Microsoft Bounty Program year in review: $17 million in rewards
We’re thrilled to share that this year, the Microsoft Bounty Program has distributed $17 million to 344 security researchers from 59 countries, the highest total bounty awarded in the program’s history. In close collaboration with the Microsoft Security Response Center (MSRC),…
Microsoft Bounty Program year in review: $17 million in rewards
We’re thrilled to share that this year, the Microsoft Bounty Program has distributed $17 million to 344 security researchers from 59 countries, the highest total bounty awarded in the program’s history. In close collaboration with the Microsoft Security Response Center (MSRC),…
Zero Day Quest: Join the largest hacking event with up to $5 million in total bounty awards
Last year, we announced the largest hacking event in history: Zero Day Quest, with up to $4 million in bounty awards. The response from the global security community was incredible and helped improve security for our customers and partners. This…
.NET Bounty Program now offers up to $40,000 in awards
We’re excited to announce significant updates to the Microsoft .NET Bounty Program. These changes expand the program’s scope, simplify the award structure, and offer great incentives for security researchers. The .NET Bounty Program now offers awards up to $40,000 USD for vulnerabilities impacting the .NET and…
How Microsoft defends against indirect prompt injection attacks
Summary The growing adoption of large language models (LLMs) in enterprise workflows has introduced a new class of adversarial techniques: indirect prompt injection. Indirect prompt injection can be used against systems that leverage large language models (LLMs) to process untrusted…
Customer guidance for SharePoint vulnerability CVE-2025-53770
Summary Microsoft is aware of active attacks targeting on-premises SharePoint Server customers. The attacks are exploiting a variant of CVE-2025-49706. This vulnerability has been assigned CVE-2025-53770. SharePoint Online in Microsoft 365 is not impacted. A patch is currently not available for…
Congratulations to the MSRC 2025 Most Valuable Security Researchers!
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…
Congratulations to the top MSRC 2025 Q2 security researchers!
Congratulations to all the researchers recognized in this quarter’s Microsoft Researcher Recognition Program leaderboard! Thank you to everyone for your hard work and continued partnership to secure customers. The top three researchers of the 2025 Q2 Security Researcher Leaderboard are…
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…
RedirectionGuard: Mitigating unsafe junction traversal in Windows
As attackers continue to evolve, Microsoft is committed to staying ahead by not only responding to vulnerabilities, but also by anticipating and mitigating entire classes of threats. One such threat, filesystem redirection attacks, has been a persistent vector for privilege…
Congratulations to the Top MSRC 2025 Q1 Security Researchers!
Congratulations to all the researchers recognized in this quarter’s Microsoft Researcher Recognition Program leaderboard! Thank you to everyone for your hard work and continued partnership to secure customers. The top three researchers of the 2025 Q1 Security Researcher Leaderboard are…
Zero Day Quest 2025: $1.6 million awarded for vulnerability research
This month, the Microsoft Security Response Center recently welcomed some of the world’s most talented security researchers at Microsoft’s Zero Day Quest, the largest live hacking competition of its kind. The inaugural event challenged the security community to focus on…
Zero Day Quest 2025: $1.6 million awarded for vulnerability research
This month, the Microsoft Security Response Center recently welcomed some of the world’s most talented security researchers at Microsoft’s Zero Day Quest, the largest live hacking competition of its kind. The inaugural event challenged the security community to focus on…
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…
Jailbreaking is (mostly) simpler than you think
Content warning: This blog post contains discussions of sensitive topics. These subjects may be distressing or triggering for some readers. Reader discretion is advised. Today, we are sharing insights on a simple, optimization-free jailbreak method called Context Compliance Attack (CCA),…
Exciting updates to the Copilot (AI) Bounty Program: Enhancing security and incentivizing innovation
At Microsoft, we are committed to fostering a secure and innovative environment for our customers and users. As part of this commitment, we are thrilled to announce significant updates to our Copilot (AI) Bounty Program. These changes are designed to…
Scaling Dynamic Application Security Testing (DAST)
Table of Contents Introduction Why most enterprises have trouble scaling DAST Web endpoint discovery Automated OpenAPI Specification generation solutions that do scale (sort of) Authentication and authorization A scalable DAST solution Web endpoint discovery Authentication and authorization Authentication hook Authorization…
Congratulations to the Top MSRC 2024 Q4 Security Researchers!
Congratulations to all the researchers recognized in this quarter’s Microsoft Researcher Recognition Program leaderboard! Thank you to everyone for your hard work and continued partnership to secure customers. The top three researchers of the 2024 Q4 Security Researcher Leaderboard are…