Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog while generating summaries might be a benefit. Why delete the original mail? How can one implement such a feature so lousy? (rhetorical question)
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog every time I read anything on microsoft, the image my brain conjures up is pedo-pal gates photo and the red string connections he has to accessing hundreds of thousands of children via school systems
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog Microsoft: "Ooooh...whoops"

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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
So...exactly according to plan.
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog As if we needed more arguments to abandon US based tech 🫠
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog I wonder how many GDPR notifications this will lead to...
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog @Npars01 I’m shocked. Shocked.
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog The shocking thing is that so many corporations and individuals still use that Spyware riddled OS.
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
@GossiTheDog Should I be surprised?
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@GossiTheDog more about problem and fix here with Tony Redmond (Office365ITPros): https://office365itpros.com/2026/02/13/dlp-policy-for-copilot-bug/
"Bug", "Code error", exposing sensitive data. Yeah, nah. I'm sure that's it. Who got the data? Microslop? Gargle? Whose hands did it end up in? Hmmm.
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Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
For some reason it hasn’t put out a security advisory - but instead buried it in a service alert which isn’t publicly visible.
Microsoft says bug causes Copilot to summarize confidential emails
Microsoft says a Microsoft 365 Copilot bug has been causing the AI assistant to summarize confidential emails since late January, bypassing data loss prevention (DLP) policies that organizations rely on to protect sensitive information.
BleepingComputer (www.bleepingcomputer.com)
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