The malware scan function in BullGuard Premium Protection 20.0.371.8 has a TOCTOU issue that enables a symbolic link attack, allowing privileged files to be deleted.
bdagent.sys in BullGuard Antivirus, Internet Security, Premium Protection, and Online Backup before 15.0.288 allows local users to write data to arbitrary memory locations, and consequently gain privileges, via a crafted 0x0022405c IOCTL call.