CVE-2021-33626

No fix known EPSS <1%

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

Published 2021-10-01 · CVE record · OSV

Products: Siemens RUGGEDCOM APE1808 - BIOS, Siemens SIMATIC Field PG M5, Siemens SIMATIC Field PG M6, Siemens SIMATIC IPC127E, Siemens SIMATIC IPC227G, Siemens SIMATIC IPC277G, Siemens SIMATIC IPC277G PRO, Siemens SIMATIC IPC327G, Siemens SIMATIC IPC377G, Siemens SIMATIC IPC427E, Siemens SIMATIC IPC477E, Siemens SIMATIC IPC477E PRO, Siemens SIMATIC IPC627E, Siemens SIMATIC IPC647E, Siemens SIMATIC IPC677E, Siemens SIMATIC IPC847E, Siemens SIMATIC ITP1000, Siemens SIPLUS IPC427E