The CClient::ProcessServerPacket method in engine/client/client.cpp in Teeworlds before 0.6.4 allows remote servers to write to arbitrary physical memory locations and possibly execute arbitrary code via vectors involving snap handling.
A memory leak in the component CConsole::Chain of Teeworlds v0.7.5 allows attackers to cause a Denial of Service (DoS) via opening a crafted file.
engine/server/server.cpp in Teeworlds 0.6.x before 0.6.3 allows remote attackers to read memory and cause a denial of service (crash) via unspecified vectors.