Microsoft Defender for Endpoint Bug Causes False BIOS Update Alerts for Dell Devices
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A bug in Microsoft Defender for Endpoint is causing false alerts for outdated BIOS firmware on Dell devices. The issue stems from a logic error in the vulnerability-fetching process. Microsoft has developed a fix and is preparing it for deployment. The bug affects Dell devices and prompts users to update their BIOS firmware unnecessarily. The number of impacted users and regions have not been disclosed. Microsoft is also addressing other false positives in its services, including issues with macOS devices and anti-spam services.
Timeline
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02.10.2025 17:20 1 articles · 0h ago
Microsoft Defender for Endpoint bug triggers false BIOS update alerts for Dell devices
A bug in Microsoft Defender for Endpoint is causing false alerts for outdated BIOS firmware on Dell devices. The issue is due to a logic error in the vulnerability-fetching process. Microsoft has developed a fix and is preparing it for deployment. The bug affects Dell devices, prompting users to update their BIOS firmware unnecessarily. The number of impacted users and regions have not been disclosed. Microsoft is also addressing other false positives in its services, including issues with macOS devices and anti-spam services.
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- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20
Information Snippets
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Microsoft Defender for Endpoint is incorrectly flagging some Dell devices as needing a BIOS update.
First reported: 02.10.2025 17:201 source, 1 articleShow sources
- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20
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The issue is due to a bug in the logic that fetches vulnerabilities for Dell devices.
First reported: 02.10.2025 17:201 source, 1 articleShow sources
- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20
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Microsoft has developed a fix for the bug and is preparing it for deployment.
First reported: 02.10.2025 17:201 source, 1 articleShow sources
- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20
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The bug affects Dell devices, prompting users to update their BIOS firmware unnecessarily.
First reported: 02.10.2025 17:201 source, 1 articleShow sources
- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20
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Microsoft has also fixed black screen crashes on macOS devices due to a deadlock in the Apple enterprise security framework.
First reported: 02.10.2025 17:201 source, 1 articleShow sources
- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20
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Earlier, Microsoft addressed false positives in its anti-spam service that blocked URLs in Microsoft Teams and Exchange Online.
First reported: 02.10.2025 17:201 source, 1 articleShow sources
- Microsoft Defender bug triggers erroneous BIOS update alerts — www.bleepingcomputer.com — 02.10.2025 17:20