Untrusted search path vulnerability in Siemens SIMATIC ProSave before 13 SP1; SIMATIC CFC before 8.0 SP4 Upd9 and 8.1 before Upd1; SIMATIC STEP 7 before 5.5 SP1 HF2, 5.5 SP2 before HF7, 5.5 SP3, and 5.5 SP4 before HF4; SIMOTION Scout before 4.4; and STARTER before 4.4 HF3 allows local users to gain privileges via a Trojan horse application file.