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Technical info
TypeSpecialized IOS

IOS15 was previously used by some official channels; it has not been stubbed because the Internet Channel, which could not be updated through standard updates, previously used it.

This IOS contains the NAND Boot Program; it seems to be a slightly modified version of v1.21 that patches the Internet Channel.

In the past, this IOS was often used by homebrew, as it is one of the only known IOSes that is safe to downgrade on RVL-CPU-20 Wiis. It was then used to patch the signing bug back into newer IOSes, like IOS36.

Titles using this IOS

None of the latest versions of these titles use IOS15.

Version history

Version Signing bug? /dev/flash access? ES_Identify? STM Release Exploit? Notes
v257 Yes Yes Yes Yes First release
v258 Yes Yes Yes Yes Added NAND Boot Program, and updated Starlet code
v259 Yes Yes Yes Yes Removed NAND Boot Program; this version is identical to v257, only with a different build tag
v260 Yes Yes Yes Yes Added back NAND Boot Program; the Broadway code is identical to v258, but the Starlet code was changed.
v265 No No No Yes
v266 No No No No
v523 No No No No 4.2 update
v1031 No No No No 4.2rev04 update. In addition to the fixes to all IOSes, the NAND Boot Program was removed, for the last time.
v1032 No No No No
v1288 No No No No Only found on vWii and newer RVL-101 units.
v26888 No No No No Only found on Wii mini