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There are 88 stars which lack colours, but have measured parallaxes in\textit{Gaia} EDR3 that place them within 20\,pc from the sun. Among them wefound two new common parallax and proper motion (CPPM) companions separatedfrom their primaries by about 3\,arcsec. The CPPM companion of a nearby($d=14.98$\,pc) F1 star, \object{HD 105452 B}, was already imaged with the\textit{Hubble Space Telescope} and is now confirmed with \textit{Gaia} dataand photometrically classified by us as M4 dwarf. The other CPPM companion,\object{SCR J1214-2345 B} orbiting an M4.5 dwarf at $d=10.77$\,pc, representsthe faintest brown dwarf discovery made by \textit{Gaia} so far. It was alsoimaged by the VISTA Hemisphere Survey and partly detected in the near-infrared.Our photometric classification led to an uncertain spectal type of T1$\pm$3 andneeds to be confirmed by spectroscopic follow-up.

\textit{Gaia} EDR3 confirms a red dwarf companion of the nearby F1 star  HD 105452 and reveals a new brown dwarf companion of the M4.5 dwarf SCR  J1214-2345