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Microsoft April 2026 Patch Tuesday security update (165 CVEs)

Security Patch Release
First reported
Last updated
Happening score
H score 62
2 unique sources, 2 articles

Summary

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Microsoft shipped April 2026 Patch Tuesday updates covering 165 CVEs, including an actively exploited zero-day and a publicly disclosed flaw, creating immediate remediation pressure across Windows and related products. The bundle matters because multiple patched bugs can enable remote code execution, elevation of privilege, or information disclosure. Microsoft also said 19 vulnerabilities are more likely to be exploited and need high-priority attention. The update spans SharePoint Server, Defender, Windows IKE, Word, and nearly 80 Edge/Chromium fixes.

Cases

BlueHammer Windows privilege escalation and Microsoft remediation (4)

Related Happenings

Amazon security patch release for CVE-2026-50549

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BeyondTrust Remote Support and Privileged Remote Access critical fixes

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About this happening: **BeyondTrust** released **RS 25.3.3** and **PRA 25.3.3** to fix **four critical vulnerabilities** in its remote-access appliances, including **pre-authentication access-control b...

Open Happening

OpenAI Daybreak expands with **GPT-5.5-Cyber** and **Codex Security** patch automation

Security Tool/Service
H score14 First: 23.06.2026 17:15 Last: 23.06.2026 17:15 Sources 1

About this happening: OpenAI expanded **Daybreak** with a full release of **GPT-5.5-Cyber** and updated **Codex Security**, widening AI-assisted patch automation for **verified defenders**. The rollout...

Open Happening

OpenAI upgrades GPT-5.5-Cyber and Codex Security plugin for vulnerability discovery and patching

Security Tool/Service
H score14 First: 23.06.2026 06:56 Last: 23.06.2026 06:56 Sources 1

About this happening: OpenAI expanded **Daybreak** by releasing an improved **GPT-5.5-Cyber** model and updating the **Codex Security plugin**, giving **trusted defenders** faster tooling for **finding...

Open Happening

Microsoft releases RoguePlanet Defender security update for CVE-2026-50656

Security Patch Release
H score32 First: 17.06.2026 20:36 Last: 17.06.2026 20:36 Sources 1

About this happening: **Microsoft** has released a **security update** for **CVE-2026-50656**, remediating **RoguePlanet** in the **Microsoft Malware Protection Engine (mpengine.dll)**. The flaw is a *...

Latest development: 09.07.2026 11:48

Microsoft released security updates for CVE-2026-50656, remediating the RoguePlanet privilege-escalation flaw in Microsoft Malware Protection Engine (mpengine.dll) with version 1.1.26060.3008 and additional defense-in-depth updates. Microsoft said no customer action is required to install the update.

Open Happening

Timeline

  1. 15.04.2026 00:22 1 articles · 2mo ago

    Microsoft April 2026 Patch Tuesday release

    Mitigation Patch Update

    Microsoft's April 2026 Patch Tuesday delivered patches for 165 CVEs, including CVE-2026-32201, an actively exploited spoofing flaw in Microsoft SharePoint Server that can let attackers view and modify sensitive information, and CVE-2026-33825, a publicly disclosed Defender antimalware platform flaw with proof-of-concept code. The update also covered critical fixes for CVE-2026-33824 in Windows Internet Key Exchange (IKE) Service Extensions, CVE-2026-33827 in Windows secure tunneling and authentication components, and nearly 80 republished Microsoft Edge and Chromium patches.

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  2. 15.04.2026 00:22 2 articles · 2mo ago

    Microsoft flags exploitation risk and hardening steps

    Technical Analysis Update

    Microsoft assessed 19 newly disclosed vulnerabilities as more likely to be exploited, and researchers warned that CVE-2026-33825 could be chained with other exploits to expand initial access and gain system-level control on vulnerable endpoints. Microsoft said Defender instances with automatic updates were already protected, while organizations that do not use IKE should block UDP ports 500 and 4500 and required IKE deployments should restrict inbound traffic to known peer addresses.

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