CVE-2026-102073 Integer overflow in APOGEE MBC (PPC) (BACnet)
Unauthenticated attackers can exploit an integer overflow in the web service to read device memory or cause denial of service in Siemens building automation controllers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102073?
CVE-2026-102073 is a high-severity vulnerability in Siemens APOGEE MBC (PPC) (BACnet), published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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 < V3.5.7), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.21), APOGEE PXC Modular (BACnet) (All versions < V3.5.7), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.21), TALON TC Compact (BACnet) (All versions < V3.5.7), TALON TC Modular (BACnet) (All versions < V3.5.7). The affected product web service does not properly validate the length of user-controllable input. This could allow an unauthenticated remote attacker to read portions of device memory or to cause a denial-of-service condition.
Weakness: CWE-191
Which versions are affected by CVE-2026-102073?
How do I fix CVE-2026-102073?
No fix has been published for CVE-2026-102073 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102073 being exploited?
There is no known exploitation of CVE-2026-102073 in the wild and no public exploit code.
Sources
Also known as GHSA-3jcw-mhf3-39cw.