Cisco IOS XE versions 17.12.4 through 17.12.6a write a 5MB/day log file that cannot be deleted, progressively filling flash memory on 230+ access point models. This storage exhaustion prevents software updates and risks bootloops. Cisco published an advisory with detection and remediation procedures.
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Cisco Wi-Fi boxes are filling their disks with 5MB of undeletable data every day
Cisco IOS XE versions 17.12.4–17.12.6a have a critical bug that writes 5MB of undeletable logs daily to 230+ access point models, exhausting storage and blocking firmware updates.
Friday, April 17, 2026 12:00 PM UTC2 MIN READSOURCE: The RegisterBY sys://pipeline
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