Linux CoD-UO server crashing with exploit warning

[HimmelHund]

Is there a known exploit for United Offensive that crashes servers?
Im using 1.51b on linux debian 2.6.11.7 with vehicle maps (TDM) only.

set sv_maprotation "gametype tdm map mp_foy  gametype tdm map mp_italy
gametype tdm map mp_ponyri gametype tdm map mp_rhinevalley gametype
tdm map mp_berlin gametype tdm map mp_uo_hurtgen gametype tdm map
mp_cassino gametype tdm map mp_kharkov"

The game crashes randomly.

This is the Crash Warning:

WARNING: Look for console commands player might be exploiting!
WARNING: Server should have crashed here!

Not using any custom maps or mods. Did remove them all.