Cybersecurity researchers have shed light on a cross-tenant blind spot that allows attackers to bypass Microsoft Defender for Office 365 protections via the guest access feature in Teams. “When users operate as guests in another tenant, their protections are determined entirely by that hosting environment, not by their home organization,” Ontinue security researcher Rhys Downing said in a report.
Read MoreMicrosoft has announced plans to improve the security of Entra ID authentication by blocking unauthorized script injection attacks starting a year from now. The update to its Content Security Policy (CSP) aims to enhance the Entra ID sign-in experience at “login.microsoftonline[.]com” by only letting scripts from trusted Microsoft domains run. “This update strengthens security and
Read MoreThe U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added a critical security flaw impacting Oracle Identity Manager to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerability in question is CVE-2025-61757 (CVSS score: 9.8), a case of missing authentication for a critical function that can result in pre-authenticated remote code execution.
Read MoreApple on Monday backported fixes for a recently patched security flaw that has been actively exploited in the wild. The vulnerability in question is CVE-2025-43300 (CVSS score: 8.8), an out-of-bounds write issue in the ImageIO component that could result in memory corruption when processing a malicious image file. “Apple is aware of a report that
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