CVE-2021-27391
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 3.4%
exploitation probability
3.4%top 12% of all CVEs
observed exploitation
nono source reports it
A vulnerability has been identified in APOGEE MBC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE MEC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE PXC Compact (BACnet) (All versions < V3.5.3), APOGEE PXC Compact (P2 Ethernet) (All versions >= V2.8), APOGEE PXC Modular (BACnet) (All versions < V3.5.3), APOGEE PXC Modular (P2 Ethernet) (All versions >= V2.8), TALON TC Compact (BACnet) (All versions < V3.5.3), TALON TC Modular (BACnet) (All versions < V3.5.3). The web server of affected devices lacks proper bounds checking when parsing the Host parameter in HTTP requests, which could lead to a buffer overflow. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the device with root privileges.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Siemens · APOGEE MBC (PPC) (P2 Ethernet)Siemens · APOGEE MEC (PPC) (P2 Ethernet)Siemens · APOGEE PXC Compact (BACnet)Siemens · APOGEE PXC Compact (P2 Ethernet)Siemens · APOGEE PXC Modular (BACnet)Siemens · APOGEE PXC Modular (P2 Ethernet)Siemens · TALON TC Compact (BACnet)Siemens · TALON TC Modular (BACnet)