IOS62 was released alongside Wii Shop Channel v21, but wasn't used by it. Instead it is used by the Wii U Transfer Tool. The 4.3-U update also includes a different version of IOS62, which is used by Wii System Transfer.
Unlike other IOS versions, IOS62's ES sysmodule allows ES_SetUid to be called not only by the System Menu but also by the Wii U Transfer Tool. This is done by checking whether (active_title_id & ~0xff) is equal to 0x0001000148435300 (HCS*).
On Wii U vWii, IOS62 has a different set of exceptions. Its v6430 allows 0001000148435400 (HCT*), and its v6686 and v6942 allow 0001000148435400 (HCT*) and 0001000848435a00 (HCZ*). Note that v6942 was released as an update at the same time HCZ* was added.
Titles using this IOS
|Version||Signing bug?||/dev/flash access?||ES_Identify?||STM Release Exploit?||STM IOCTL overflow?||SDI register index bug?||Notes|
|v5663||No||No||No||No||No||No||Never released, but known to exist because of the Wii mini version|
|v6430||No||No||No||No||No||No||First release. November 6, 2012.|
|v6686||No||No||No||No||No||No||Added HCZ* access. vWii only, never released on SOAP server.|
|v31263||No||No||No||No||No||No||Only found on Wii mini|