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  • Microsoft’s Response to Open-Source Vulnerabilities - CVE-2023-4863 and CVE-2023-5217 October 2, 2023
    Microsoft is aware and has released patches associated with the two Open-Source Software security vulnerabilities, CVE-2023-4863 and CVE-2023-5217. Through our investigation, we found that these affect a subset of our products and as of today, we have addressed them in our products as outlined below: CVE-2023-4863 Microsoft Edge Microsoft Teams for Desktop Skype for Desktop Webp Image Extensions (Released […]
  • Journey Down Under: How Rocco Became Australia’s Premier Hacker September 25, 2023
    Fun facts about Rocco Calvi (@TecR0c): Microsoft MVR: Rocco is a 2023 Microsoft Most Valuable Researcher. Fitness fanatic: Inspired by old-school body building and countless hours of chopping and carrying wood in the mountains during his youth, Rocco remains a fitness enthusiast, setting himself challenges and pushing his limits.
  • Microsoft mitigated exposure of internal information in a storage account due to overly-permissive SAS token September 18, 2023
    Summary Summary As part of a recent Coordinated Vulnerability Disclosure (CVD) report from, Microsoft investigated and remediated an incident involving a Microsoft employee who shared a URL for a blob store in a public GitHub repository while contributing to open-source AI learning models. This URL included an overly-permissive Shared Access Signature (SAS) token for […]
  • Results of Major Technical Investigations for Storm-0558 Key Acquisition September 6, 2023
    On July 11, 2023, Microsoft published a blog post which details how the China-Based threat actor, Storm-0558, used an acquired Microsoft account (MSA) consumer key to forge tokens to access OWA and Upon identifying that the threat actor had acquired the consumer key, Microsoft performed a comprehensive technical investigation into the acquisition of the […]
  • Azure Serial Console Attack and Defense - Part 1 August 10, 2023
    Ever had a virtual machine crash? Azure Serial console is a great way to directly connect to your Virtual machine and debug what went wrong. Azure Serial Console is a feature that’s available for free for everyone. While the primary intent of this feature is to assist users debug their machine, there are several interesting […]
  • Updating our Vulnerability Severity Classification for AI Systems August 8, 2023
    The Microsoft Security Response Center (MSRC) is always looking for ways to provide clarity and transparency around how we assess the impact of vulnerabilities reported in our products and services. To this end, we are announcing the Microsoft Vulnerability Severity Classification for AI Systems, an update to Microsoft’s existing vulnerability severity classification (i.
  • Congratulations to the MSRC 2023 Most Valuable Security Researchers! August 8, 2023
    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 top 100 Most Valuable Researchers (MVRs) based on the total number of points earned for each valid report.
  • Microsoft Bug Bounty Program Year in Review: $13.8M in Rewards August 7, 2023
    We are thrilled to share the results of our collaboration with over 345 security researchers from +45 countries around the world in the past 12 months. Together, we have discovered and fixed more than a thousand potential security issues before they impacted our customers. In recognition of this valuable collaboration, we have awarded $13.
  • Microsoft mitigates Power Platform Custom Code information disclosure vulnerability August 4, 2023
    Summary Summary On 30 March 2023, Tenable informed Microsoft under Coordinated Vulnerability Disclosure (CVD) of a security issue concerning Power Platform Custom Connectors using Custom Code. This feature allows customers to write code for custom connectors. This issue has been fully addressed for all customers and no customer remediation action is required.
  • BlueHat October 2023 Call for Papers is Now Open! July 27, 2023
    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 both inside and […]