Between 4.2rev04 and 4.3rev03, this IOS was installed to get access to the /tmp/title.tmd downgrade bug, as a vulnerable version is available on NUS; the bug would be used to downgrade IOS15, which would then be used to patch other IOSes. Nintendo fixed this in 4.3rev03 by releasing the Korean IOSes in all regions.
Titles using this IOS
|Version||Signing bug?||ES_Identify / /dev/flash?||STM Release Exploit?||Notes|
|v2320||No||?||?||Korean only, not available on NUS.|
|v3863||No||No||No||Only found on vWii and newer RVL-101 units.|