Cisco’s Wireless Controller Flaw: The Uninvited Guest RSVP’d

Cisco fixed a critical flaw in its IOS XE Wireless Controller. This flaw, with a CVSS score of 10, allowed remote attackers to upload arbitrary files. Thankfully, the vulnerability is only exploitable if a certain feature is enabled—and it’s disabled by default. Cisco’s advice? Disable it until the fix is fully applied.

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Hot Take:

Cisco just dropped a fix for a flaw so big, it could let attackers upload files like they’re DJ Khaled dropping another one. This is the kind of bug that keeps IT folks up at night, pondering the meaning of vulnerability scores, and wondering if their routers are secretly trying to take over the world. But fear not, because Cisco’s got your back with a patch, and all you need to do is update faster than you can say “file upload exploit.” It’s like the ultimate tech whack-a-mole—hit that update button before the moles hit you!

Key Points:

  • Cisco patched a critical flaw in its IOS XE Wireless Controller.
  • The vulnerability, CVE-2025-20188, scored a perfect 10 on the CVSS scale.
  • Exploit involves sending crafted HTTPS requests to gain root access.
  • The flaw is disabled by default but affects several Catalyst products.
  • No known attacks exploiting this flaw in the wild yet.

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