Guilherme Rodrigues (guispark)
@guiispark
🇧🇷🧑🏾💻 InfoSec Analyst |🐞 ETH Hacker | Bug Hunter | 🏆 Microsoft MVR 2023 & 2025 | 👑 Microsoft Leaderboard: Q1/23 • Q4/24 • Q1/25 • Q2/25
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Microsoft updated the MVR leaderboard after fixing a scoring issue! I moved from 81st to 69th globally 🔥 Also earned the Digital Badge for volume (5+ valid reports)! Grateful for the recognition — let’s keep pushing! 🚀 @msftsecresponse
Thank you @msftsecresponse for the amazing swag box! Grateful for the collaboration in making Microsoft products safer and protecting millions of users. 💙🔐
Security updates for September 2025 are now available! Details are here: msft.it/6018SZEg0 #PatchTuesday #SecurityUpdateGuide
🎉 Excited to share an amazing milestone! I received my highest bounty ever from a security report that required a lot of learning, effort, and dedication. Grateful to everyone who made this journey possible! 🚀 @msftsecresponse #bugbounty #bugbountytips
Hackers, To make our pricing fairer worldwide, we’re trying out localized pricing. We’re starting with Brazil 🇧🇷, with Individual plan prices dropping by about 50%. 💸 Monthly: ~110 BRL → 55 BRL 💸 Yearly: ~1,100 BRL → 550 BRL Which country should we do next?…
Are you a security researcher hoping to qualify for Zero Day Quest or looking to level up your research game? MSRC invites you to a two-part series of candid conversations with our internal researchers, designed to help you sharpen your skills and stay inspired during the…
Security updates for August 2025 are now available! Details are here: msft.it/6018SZEg0 #PatchTuesday #SecurityUpdateGuide
Bug Bounty is also a lifestyle. Hahaha #bugbountytip #bugbountytips #msrc #microsoft #infosec @msftsecresponse
Over the past year, the Microsoft Bounty Program distributed $17 million to 344 security researchers from 59 countries—the highest total bounty awarded in the program’s history. Thank you to our global security researcher community for helping us protect customers and the world.…
The MSRC team and I are excited up to connect and learn from security researchers and the community at Black Hat & DEF CON this week! If you spot me, I might have a shirt with your name on it. #blackhat2025 #blackhat #defcon @msftsecresponse
Microsoft’s Zero Day Quest is back and bigger than ever. Last year, we launched the largest public hacking event in history, and the global security community responded with incredible energy and expertise. We’re increasing our commitment with up to $5 million in total bounty…
Attention security researchers! 📣 The Microsoft .NET Bounty Program just got a major upgrade, with rewards now up to $40,000 for critical vulnerabilities in .NET and ASP. NET Core (including Blazor & Aspire). Learn more in our blog post: msrc.microsoft.com/blog/2025/07/.…
Same, bro! That’s so amazing, but at the same time so exhausting. 🤯
Update: Microsoft has released updated analysis of Storm-2603 and Warlock ransomware. Customers should apply the on-premises SharePoint Server security updates immediately and follow the detailed mitigation guidance in our blog: msft.it/6040s130q
We updated our blog with expanded analysis and threat intelligence from newly observed activity by Storm-2603 leading to the deployment of Warlock ransomware. msft.it/6011s132J
Microsoft has released security updates for all supported on-premises SharePoint Server versions. Cloud-hosted SharePoint is not affected. We strongly urge customers to apply these updates immediately to protect against active exploitation. Our latest blog also shares insights…
Microsoft is sharing details from ongoing investigations of threat actors exploiting vulnerabilities targeting on-premises SharePoint servers. Linen Typhoon, Violet Typhoon, and Storm-2603 have been observed exploiting the vulnerabilities: msft.it/6015sE1p5
Microsoft has released security updates that fully protect customers using all supported versions of SharePoint affected by CVE-2025-53770 and CVE-2025-53771. These vulnerabilities apply to on-premises SharePoint Servers only. Customers should apply these updates immediately to…
Update on CVE-2025-53770: Microsoft has released a security update for SharePoint Subscription Edition to mitigate active attacks targeting on-premises servers. SharePoint Online is not affected. Customers should apply the update immediately. We are actively working on updates…
Our previously published Most Valuable Researchers (MVR) leaderboard contained inaccuracies due to technical issues on our end. We apologize for the error and have since resolved the issue. We’re now sharing a fully refreshed and accurate leaderboard. The Microsoft Researcher…
🎉 I’m excited to share that I’ve been recognized by Microsoft as one of the Top 100 Most Valuable Researchers (MVRs) for 2025, ranking 81st on the official list! msrc.microsoft.com/leaderboard @msftsecresponse @Microsoft
The Microsoft Researcher Recognition Program offers public thanks and recognition to security researchers who help protect our customers by discovering and sharing security vulnerabilities under Coordinated Vulnerability Disclosure. Today, we are excited to recognize this year’s…
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