In FreeRDP before version 2.1.2, there is a global OOB read in update_read_cache_bitmap_v3_order. As a workaround, one can disable bitmap cache with -bitmap-cache (default). This is fixed in version 2.1.2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 49.9%