Buffer overflow in Siemens products - CVE-2021-27391
Published: September 15, 2021
Vulnerability identifier: #VU56616
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-27391
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when parsing specific requests. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
APOGEE MBC
APOGEE MEC
APOGEE PXC Compact (P2 Ethernet)
APOGEE PXC Modular (P2 Ethernet)
APOGEE PXC Compact (BACnet)
APOGEE PXC Modular (BACnet)
TALON TC Compact (BACnet)
TALON TC Modular (BACnet)
APOGEE MEC
APOGEE PXC Compact (P2 Ethernet)
APOGEE PXC Modular (P2 Ethernet)
APOGEE PXC Compact (BACnet)
APOGEE PXC Modular (BACnet)
TALON TC Compact (BACnet)
TALON TC Modular (BACnet)
How to mitigate CVE-2021-27391
Install updates from vendor's website.
APOGEE PXC Compact (BACnet) - update to 3.5.3
APOGEE PXC Modular (BACnet) - update to 3.5.3
TALON TC Compact (BACnet) - update to 3.5.3
TALON TC Modular (BACnet) - update to 3.5.3
APOGEE PXC Modular (BACnet) - update to 3.5.3
TALON TC Compact (BACnet) - update to 3.5.3
TALON TC Modular (BACnet) - update to 3.5.3