CVE-2026-22885 in SmartServer IoT
Summary
by MITRE • 02/20/2026
A vulnerability exists in EnOcean SmartServer IoT version 4.60.009 and prior, which would allow remote attackers, in the LON IP-852 management messages, to send specially crafted IP-852 messages resulting in a memory leak from the program's memory.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 02/20/2026
The vulnerability identified as CVE-2026-22885 affects the EnOcean SmartServer IoT platform version 4.60.009 and earlier releases, representing a critical memory management flaw within the LON IP-852 communication protocol implementation. This issue manifests when the system processes specially crafted IP-852 management messages that are transmitted over the LON (Local Operating Network) protocol, which is commonly used in building automation and smart home environments. The flaw resides in how the SmartServer handles incoming management messages, specifically failing to properly validate or sanitize the memory allocation processes during message processing.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the LON protocol handler, which allows attackers to construct malicious IP-852 messages that trigger improper memory handling behaviors. When these crafted messages are received and processed, the system's memory management routines fail to properly release allocated memory segments, leading to progressive memory consumption over time. This memory leak behavior is particularly concerning as it can occur silently without immediate system failure, gradually degrading performance until system instability or complete service disruption occurs. The vulnerability maps to CWE-401: "Improper Release of Memory Before Removing Last Reference" and aligns with ATT&CK technique T1499.004: "Endpoint Denial of Service" through memory exhaustion attacks.
The operational impact of this vulnerability extends beyond simple performance degradation, as it creates potential pathways for more severe attacks within building automation networks. Remote attackers can leverage this memory leak to conduct persistent denial of service attacks against critical infrastructure components, potentially disrupting smart building operations, security systems, and environmental controls. The vulnerability's remote exploitability means that attackers do not require physical access to the network, making it particularly dangerous in enterprise and industrial environments where such systems are deployed. Network monitoring tools may not immediately detect this issue as it manifests as a gradual resource exhaustion rather than obvious protocol violations or network anomalies. The cumulative effect of memory leaks can lead to system crashes, requiring manual intervention and potentially resulting in extended downtime for critical building management functions.
Mitigation strategies for CVE-2026-22885 should prioritize immediate implementation of firmware updates from EnOcean to address the memory management flaw in the LON protocol handler. Network segmentation and access control measures should be implemented to limit exposure of the SmartServer to untrusted networks, particularly by isolating the LON management interfaces from external access. Regular monitoring of system memory consumption and network traffic patterns should be established to detect early signs of memory leak exploitation, with automated alerts configured for unusual memory usage trends. Additionally, implementing rate limiting and message validation controls on incoming LON management messages can help reduce the impact of crafted malicious payloads. Organizations should also conduct comprehensive vulnerability assessments of their entire building automation ecosystem to identify potential secondary impacts from similar memory management flaws in interconnected devices, ensuring that the remediation efforts address the root cause rather than just symptoms of the vulnerability.