Full Report
[Control systems] Siemens security advisory (AV26-448)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Siemens Industrial and Software Products (AV26-448)
## CVE Details
*Note: This specific advisory (AV26-448) acts as a cumulative notification for multiple Siemens security bulletins published on May 12, 2026. Specific CVE identifiers vary by product.*
- **CVE ID:** Multiple (Refer to Siemens CERT for individual IDs)
- **CVSS Score:** Varies (Up to Critical/High depending on the specific product)
- **CWE:** Varies (Includes common weaknesses such as Memory Corruption, Improper Input Validation, and Remote Code Execution)
## Affected Systems
- **Products & Versions:**
- **RUGGEDCOM ROX II:** Versions prior to V2.17.1
- **RUGGEDCOM RM1224 LTE(4G) EU:** Versions prior to V8.3
- **Solid Edge SE2026:** Versions prior to V226.0 Update 5
- **gWAP:** Versions prior to V3.1.1
- **Simcenter Femap:** Versions prior to V2512.0003
- **SENTRON 7KT PAC1261 Data Manager:** Versions prior to V2.1.0
- **SIMATIC Drive Controller Family/CPU 1504D TF:** Versions prior to V3.1.6
- **SIMATIC S7-1500 CPU:** Versions prior to V2.9.9
- **KACO blueplanet Inverters:** Versions prior to V6.1.4.9
- **SIMATIC HMI Unified Comfort Panels (Hygienic/Standard):** Versions prior to V21
- **ROS#:** Versions prior to V2.2.2
- **Opcenter RDnL:** Versions prior to V2.52.0
- **SIMATIC CN 4100:** Versions prior to V5.0
- **Miscellaneous:** RUGGEDCOM APE1808, SCALANCE (multiple), Teamcenter (multiple), SIPROTEC 5 (multiple), SIMATIC ET 200SP CPU (multiple), Industrial Edge Devices.
## Vulnerability Description
This advisory covers a wide array of technical flaws across the Siemens portfolio. Key technical themes typical of these updates include:
1. **Memory Management Issues:** Found in engineering software (Solid Edge, Simcenter), potentially allowing code execution via malicious files.
2. **Network Protocol Vulnerabilities:** Affecting industrial communication hardware (SCALANCE, RUGGEDCOM) which may lead to Denial of Service (DoS) or unauthorized access.
3. **Authentication/Logic Flaws:** In web-based management interfaces (Industrial Edge, HMI Panels).
## Exploitation
- **Status:** Consult specific sub-advisories; generally, Siemens patches are issued before widespread exploitation, but PoCs for software-based file parsing vulnerabilities often emerge quickly.
- **Complexity:** Low to Medium.
- **Attack Vector:** Primarily Network (for controllers/gateways) and Local (for engineering software requiring user interaction with a file).
## Impact
- **Confidentiality:** High (Potential data theft from Teamcenter/Opcenter)
- **Integrity:** High (Modification of PLC logic or device configuration)
- **Availability:** High (Potential for Denial of Service in critical infrastructure controllers)
## Remediation
### Patches
Siemens recommends updating to the following versions or newer:
- **RUGGEDCOM ROX II:** V2.17.1
- **RUGGEDCOM RM1224 LTE:** V8.3
- **Solid Edge SE2026:** V226.0 Update 5
- **gWAP:** V3.1.1
- **Simcenter Femap:** V2512.0003
- **SENTRON 7KT PAC1261:** V2.1.0
- **SIMATIC Drive Controller/S7-1500:** V3.1.6 / V2.9.9
- **KACO blueplanet:** V6.1.4.9
- **SIMATIC HMI:** V21
- **ROS#:** V2.2.2
- **Opcenter RDnL:** V2.52.0
- **SIMATIC CN 4100:** V5.0
### Workarounds
- **RUGGEDCOM APE1808:** Contact customer support directly for specific patch instructions.
- **General Mitigation:** Restrict access to industrial networks; ensure engineering workstations do not open files from untrusted sources; transition to "Defense-in-Depth" architectures.
## Detection
- **Indicators of Compromise:** Unusual administrative logins, unexpected device reboots (DoS), or unauthorized changes to PLC configurations.
- **Detection methods:** Use Siemens-specific OT security monitoring tools or generic IDS/IPS signatures for known CVEs referenced in the individual advisory leaflets.
## References
- Siemens Security Advisory Portal: hxxps[://]www[.]siemens[.]com/global/en/products/services/cert[.]html#SecurityPublications
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/control-systems-siemens-security-advisory-av26-448