CVE-2025-40555 Denial of service in APOGEE PXC+TALON TC Series (BACnet)
An attacker on the same BACnet network can cause a denial of service in Siemens APOGEE controllers by sending a crafted createObject request, requiring a power cycle to recover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-40555?
CVE-2025-40555 is a medium-severity denial of service vulnerability in Siemens APOGEE PXC+TALON TC Series (BACnet), published on 13 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been identified in APOGEE PXC+TALON TC Series (BACnet) (All versions). Affected devices start sending unsolicited BACnet broadcast messages after processing a specific BACnet createObject request. This could allow an attacker residing in the same BACnet network to send a specially crafted message that results in a partial denial of service condition of the targeted device, and potentially reduce the availability of BACnet network. A power cycle is required to restore the device's normal operation.
Weakness: CWE-440
Which versions are affected by CVE-2025-40555?
How do I fix CVE-2025-40555?
No fix has been published for CVE-2025-40555 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-40555 being exploited?
There is no known exploitation of CVE-2025-40555 in the wild and no public exploit code.
Sources
Also known as GHSA-vj87-7w3c-ghmp.