KDE Kleopatra before 26.08.0 on Windows allows local users to obtain the privileges of a Kleopatra user, because there is an error in the mechanism (KUniqueService) for ensuring that only one instance is running.
Exploitability
AV:LAC:HPR:NUI:NScope
S:UImpact
C:HI:HA:L6.9/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:LOther