Exploit details for max severity Cisco IOS XE flaw now public

Technical details about a maximum-severity Cisco IOS XE WLC arbitrary file upload flaw tracked as CVE-2025-20188 have been made publicly available, bringing us closer to a working exploit. The write-up by Horizon3 researchers does not contain a 'ready-to-run' proof of concept RCE exploit script, but it does provide enough information for a skilled attacker or even an LLM to fill in the missing pieces. Given the immediate risk of weaponization and widespread use in attacks, it is recommended that impacted users take action now to protect their endpoints. The Cisco IOS XE WLC flaw Cisco disclosed the critical flaw in IOS XE Software for Wireless LAN Controllers on May 7, 2025, which allows an attacker to take over devices. The vendor said it is caused by a hard-coded JSON Web Token (JWT) that allows an unauthenticated, remote attacker to upload files, perform path traversal, and execute arbitrary commands with root privileges. The bulletin noted that CVE-2025-20188 is only dangerou ... Read full article.