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Vulnerability · Published Nov 9, 2021 · Assigned by siemens

CVE-2021-31885

High 7.5

In plain English

A high-severity security flaw in APOGEE MBC (PPC) (BACnet) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).

Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.2%top 30.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.1), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). TFTP server application allows for reading the contents of the TFTP memory buffer via sending malformed TFTP commands. (FSMD-2021-0009)

Affected products (as reported)

VendorProductVersions
Siemens APOGEE MBC (PPC) (BACnet) All versions
Siemens APOGEE MBC (PPC) (P2 Ethernet) All versions
Siemens APOGEE MEC (PPC) (BACnet) All versions
Siemens APOGEE MEC (PPC) (P2 Ethernet) All versions
Siemens APOGEE PXC Compact (BACnet) All versions < V3.5.4
Siemens APOGEE PXC Compact (P2 Ethernet) All versions < V2.8.19
Siemens APOGEE PXC Modular (BACnet) All versions < V3.5.4
Siemens APOGEE PXC Modular (P2 Ethernet) All versions < V2.8.19
Siemens Desigo PXC00-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC00-U All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC001-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC100-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC12-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC128-U All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC200-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC22-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC22.1-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC36.1-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC50-E.D All versions >= V2.3 and < V6.30.016
Siemens Desigo PXC64-U All versions >= V2.3 and < V6.30.016
Siemens Desigo PXM20-E All versions >= V2.3 and < V6.30.016
Siemens Nucleus NET All versions
Siemens Nucleus ReadyStart V3 All versions < V2017.02.4
Siemens Nucleus ReadyStart V4 All versions < V4.1.1
Siemens Nucleus Source Code All versions
Siemens PLUSCONTROL 1st Gen All versions
Siemens TALON TC Compact (BACnet) All versions < V3.5.4
Siemens TALON TC Modular (BACnet) All versions < V3.5.4

Weakness: CWE-805

References