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 They would never...
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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)
[Edit] that mail gets deleted was an assumption on my part based on "data loss prevention" in the text. It might not be the case. And the issue is only that E-Mails are summarized while flagged to not get summarized in one view of the app.
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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)
@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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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 I literally had a supervisor excitedly sharing news on Friday that we would be rolling out ChatGPT for organizational use and how it was approved for editing confidential documents. I sent back a private reply that yeah, you better not believe that for an instant.
I just forwarded this link, can't wait to see the reply.
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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 bug is "The warnings come at the end of the email", presumably.
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@GossiTheDog while generating summaries might be a benefit. Why delete the original mail? How can one implement such a feature so lousy? (rhetorical question)
[Edit] that mail gets deleted was an assumption on my part based on "data loss prevention" in the text. It might not be the case. And the issue is only that E-Mails are summarized while flagged to not get summarized in one view of the app.
Where does it say the original email was deleted? I'm not seeing that.
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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 Active #espionage
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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)
"No! - Yes! - Oh!"
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@GossiTheDog more about problem and fix here with Tony Redmond @TonyRedmond (Office365ITPros): https://office365itpros.com/2026/02/13/dlp-policy-for-copilot-bug/
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@GossiTheDog This is the same sort of shit as with Recall, where numerous people sounded the alarm that the feature was going to hoover up all sorts of stuff you really didn't want to be in an easily searchable index and then they implemented some half assed controls after the fact. Same shit, different week.
@Infoseepage @GossiTheDog
The all-new Microsoft!
Now with 30% AI slop! -
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 We should pay them more money for their services to improve things.