20.4.0

The Switch 20.4.0 system update was released on September 2, 2025 (UTC). This Switch update was released for the following regions: ALL.

Security flaws fixed: <fill this in manually later, see the updatedetails page from the ninupdates-report page(s) once available for now>.

Change-log

Official ALL change-log:

• General system stability improvements to enhance the user's experience.

System Titles

• The following titles were updated:
  • Sysmodules: hid.
  • SystemData (non-sysver): BrowserDll, Help, ClientCertData.
  • Applets: LibAppletWeb, LibAppletShop, LibAppletOff, LibAppletLns, LibAppletAuth.

RomFs changes:

• BrowserDll: "/buildinfo/buildinfo.dat" updated, "/nro/netfront/core_3/default/cfi_enabled/oss_wkc.nro.lz4" updated, "/nro/netfront/core_3/default/cfi_enabled/webkit_wkc.nro.lz4" updated
• Help: "/legallines.htdocs/index.html" updated
  • For the libxml2 license, the following was added: " Copyright (C) The Libxml2 Contributors."
• SystemVersion: All files updated.
• LibAppletOff/LibAppletWeb/LibAppletShop/LibAppletLns/LibAppletAuth: All files updated.

hid

• Updated L_2b8e8, prev ver @ L_2b8e8.
  • IPC handler func for hid:sys RegisterAppletResourceUserId, added a new cmd input param.
• Updated L_52d70, prev ver @ L_52d70.
  • Now writes u8 inw3 into state.
• Updated L_530c8, prev ver @ L_530b8.
  • Now clears an additional field.
• Updated L_537f8, prev ver @ L_537d8.
  • This is eventually called from hid CreateAppletResource.
  • Now calls L_52d70 with an additional param, w3=0.
• Various funcs were updated with minor changes.
• Updated L_56cd4, prev ver @ L_56cb4.
  • This is the impl func for hid:sys RegisterAppletResourceUserId.
  • The additional input param is now passed to L_99354.
• Updated L_99354, prev ver @ L_99304.
  • The additional input param is now passed to L_52d70.
• Updated L_a4ab0, prev ver @ L_a4a50.
• L_a6440 from prev ver was removed (this was called by L_a4a50 in prev ver).

See Also

System update report(s):

• [1]