Microsoft Defender Zero

Gbhackers •Mayura Kathir • May 21, 2026

Microsoft has disclosed two new zero-day vulnerabilities in Microsoft Defender that are actively being exploited in the wild, raising concerns among security professionals and enterprise users. The vulnerabilities, tracked as CVE-2026-41091 and CVE-2026-45498, were officially released on May 19, 2026, and both have confirmed exploitation activity according to Microsoft’s security advisory. The most critical of […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical RCE Vulnerability in BeyondTrust Software Requires Immediate Patching BeyondTrust has issued a warning regarding a critical remote code execution (RCE) vulnerability in its Remote Support and Privileged Remote Access software. The flaw, tracked as CVE-2026-1731, allows unauthenticated attackers to execute arbitrary code remotely and affects versions 25.3.1 or earlier of Remote Support and 24.3.4 or earlier of Privileged Remote Access. Users are advised to apply the patches released on February 6, 2026, to mitigate the risk of exploitation. 860 sources 67

Extracted Entities

Microsoft Defender Zero

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Extracted Entities

Attack Types (1)

CVEs (2)

Platforms (1)