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 Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). FTP server does not properly validate the length of the “PWD/XPWD” command, leading to stack-based buffer overflows. This may result in Denial-of-Service conditions and Remote Code Execution. (FSMD-2021-0016)
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 Source Code | All versions | — |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.4 | — |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.4 | — |
Advisories 5
- ICSA-21-315-07 Siemens Nucleus RTOS-based APOGEE and TALON Products (Update C) CISA ICS & IT advisories · May 6, 2025
- ICSA-21-313-03 Siemens Nucleus RTOS TCP/IP Stack CISA ICS & IT advisories · May 6, 2025
- SSA-114589 SSA-114589: Multiple Vulnerabilities in Nucleus RTOS based APOGEE, TALON and Desigo PXC/PXM Products Siemens ProductCERT · May 10, 2022
- SSA-044112 SSA-044112: Multiple Vulnerabilities (NUCLEUS:13) in the TCP/IP Stack of Nucleus RTOS Siemens ProductCERT · Dec 14, 2021
- VDE-2021-050 WAGO: Multiple devices affected by Vulnerabilities in NUCLEUS TCP Stack. CERT@VDE · Nov 16, 2021