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Microsoft Defender for Office 365 Safe Links blocks legitimate Google search links

Service Disruption
First reported
Last updated
Happening score
H score 0
1 unique sources, 1 articles

Summary

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Microsoft Defender for Office 365 Safe Links is blocking legitimate Google search links as malicious, preventing users from opening them normally and triggering warning prompts. The issue is tied to an inaccurate security classification and is generating related alerts in Microsoft Sentinel and the Defender portal.

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Microsoft Defender Antivirus false 'turned off' alerts after latest updates

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H score11 First: 31.08.2026 11:29 Last: 31.08.2026 11:29 Sources 1

About this happening: Microsoft Defender Antivirus is showing false 'turned off' alerts after the latest updates, creating confusion on supported Windows client and server systems even though p...

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Microsoft Defender signature update fixes scan-crash bug on Windows 10 and Windows 11

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H score11 First: 19.08.2026 14:14 Last: 19.08.2026 14:14 Sources 1

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Midnight Blizzard CaptiveCrunch hospitality Wi-Fi phishing campaign

Campaign
H score37 First: 04.08.2026 03:17 Last: 04.08.2026 03:17 Sources 1

About this happening: Microsoft linked CaptiveCrunch to Midnight Blizzard / APT29, a global operation that abuses hospitality Wi‑Fi to steal Microsoft 365 accounts and deliver malware....

Open Happening

Microsoft Defender BlueHammer (CVE-2026-33825) ransomware exploitation wave

Exploitation Wave
H score41 First: 30.06.2026 11:53 Last: 30.06.2026 11:53 Sources 1

About this happening: CISA has flagged BlueHammer (CVE-2026-33825) as exploited in ransomware campaigns, expanding the risk to Windows devices exposed to privilege escalation. The flaw in *...

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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 Defender security updates for CVE-2026-50656 remediated RoguePlanet, a privilege-escalation flaw in the Microsoft Malware Protection Engine (mpengine.d...

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. 02.09.2026 13:30 2 articles · 2h ago

    Microsoft investigates Safe Links blocking legitimate Google search links

    Initial Disclosure

    Microsoft is investigating a Defender for Office 365 Safe Links issue in which legitimate Google search links are incorrectly classified as malicious, causing users to see "Opening this website might not be safe" warnings when opening the blocked URLs. Microsoft also says IT administrators may see related alerts and incidents in Microsoft Sentinel and the Defender portal while it works to correct the misclassification.

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