this post was submitted on 04 Feb 2026
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Microsoft releases urgent Office patch. Russian-state hackers pounce. (arstechnica.com)
submitted 4 hours ago by return2ozma@lemmy.world to c/technology@lemmy.world
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[โ€“] Australis13@fedia.io 7 points 2 hours ago (1 children)

Rather impressive how quickly the hackers reverse-engineered Microsoft's patch and used the vulnerability whilst the opportunity was still available:

The threat group, tracked under names including APT28, Fancy Bear, Sednit, Forest Blizzard, and Sofacy, pounced on the vulnerability, tracked as CVE-2026-21509, less than 48 hours after Microsoft released an urgent, unscheduled security update late last month, the researchers said. After reverse-engineering the patch, group members wrote an advanced exploit that installed one of two never-before-seen backdoor implants.

[โ€“] frongt@lemmy.zip 5 points 1 hour ago

And this is why quickly applying security updates is important.