CVE-2026-102073
Received Received - Intake

Buffer Overflow in Siemens APOGEE PXC Series

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: siemens-SADP

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.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-102073
EUVD
EUVD-2026-98406

Affected Vendors & Products

Showing 10 associated CPEs
Vendor Product Version / Range
Siemens APOGEE MBC (PPC) (BACnet) 0
Siemens APOGEE MBC (PPC) (P2 Ethernet) 0
Siemens APOGEE MEC (PPC) (BACnet) 0
Siemens APOGEE MEC (PPC) (P2 Ethernet) 0
Siemens APOGEE PXC Compact (BACnet) 0
Siemens APOGEE PXC Compact (P2 Ethernet) 0
Siemens APOGEE PXC Modular (BACnet) 0
Siemens APOGEE PXC Modular (P2 Ethernet) 0
Siemens TALON TC Compact (BACnet) 0
Siemens TALON TC Modular (BACnet) 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-191 The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Attack-Flow Graph

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Executive Summary

This vulnerability affects multiple Siemens building automation products. It involves improper input validation in the web service, allowing unauthenticated remote attackers to read device memory or cause denial-of-service conditions.

Detection Guidance

Detecting this vulnerability requires checking for affected Siemens devices with exposed web services. Use network scanning tools like Nmap to identify devices running web services on standard ports (e.g., 80, 443, 8080). Example command: nmap -p 80,443,8080 --open <target_IP>. Inspect device banners or service versions for matches with affected products listed in the CVE.

Impact Analysis

An attacker could exploit this to access sensitive device memory or crash systems, potentially disrupting building operations. This may lead to unauthorized data exposure or operational downtime in affected environments.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by exposing sensitive device memory or causing denial-of-service conditions. Unauthorized access to device memory may lead to data breaches, violating confidentiality requirements under these regulations. The lack of proper input validation also undermines security controls mandated by GDPR and HIPAA for protecting personal and health information.

Mitigation Strategies

Disable the FTP/Web service on affected devices as a mitigation measure. For products like APOGEE PXC Compact and Modular, apply available updates to address the vulnerability.

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