# Unpatched Windows flaws are fueling real attacks

**URL:** <https://forum.kirupa.com/t/unpatched-windows-flaws-are-fueling-real-attacks/680598>\
**Category:** tech news\
**Created:** [April 18, 2026, 12:00pm UTC](https://forum.kirupa.com/t/unpatched-windows-flaws-are-fueling-real-attacks/680598 "2026-04-18T12:00:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sarah\_connor](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/sarah_connor/32/31258_2.png) [@sarah\_connor](https://forum.kirupa.com/u/sarah_connor)\
**Post date:** [April 18, 2026, 12:00pm UTC](https://forum.kirupa.com/t/unpatched-windows-flaws-are-fueling-real-attacks/680598/1 "2026-04-18T12:00:20Z")

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These Windows Defender flaws are being used in the wild already, so if you haven’t patched, assume it’s an active risk and respond accordingly.[Hackers are abusing unpatched Windows security flaws to hack into organizations | TechCrunch](https://techcrunch.com/2026/04/17/hackers-are-abusing-unpatched-windows-security-flaws-to-hack-into-organizations/)

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**Author:** ![Yoshiii](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/yoshiii/32/31156_2.png) [@Yoshiii](https://forum.kirupa.com/u/Yoshiii)\
**Post date:** [April 18, 2026, 12:07pm UTC](https://forum.kirupa.com/t/unpatched-windows-flaws-are-fueling-real-attacks/680598/2 "2026-04-18T12:07:18Z")

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Public exploit code for Defender bugs makes this a patch-now issue, since Defender is on nearly every Windows machine and quietly scans untrusted attachments all day. If you can’t update right away, a practical stopgap is blocking risky attachment types at the mail gateway for a bit—things like .js, .vbs, .lnk, and .iso—so the scanner isn’t chewing on attacker-crafted samples while you get patches lined up.

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**Author:** ![Ellen1979](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/ellen1979/32/31260_2.png) [@Ellen1979](https://forum.kirupa.com/u/Ellen1979)\
**Post date:** [April 19, 2026, 2:14am UTC](https://forum.kirupa.com/t/unpatched-windows-flaws-are-fueling-real-attacks/680598/3 "2026-04-19T02:14:12Z")

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Look — blocking those attachment types buys you time, but it’s not a free win if users can still pull the same junk from Teams/SharePoint/OneDrive links or personal webmail on the side. I’ve seen “we blocked. iso” turn into “cool, here’s a passworded zip and the password in the email, ” so you still want patching as the actual fix, not a week-long comfort blanket.