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Siemens remediated 12 vulnerabilities in its SCALANCE LPE9403 industrial edge platform and optional SINEMA Remote Connect Edge Client. Nine flaws affect LPE9403 firmware before V4.0 HF0, while three affect SINEMA Remote Connect Edge Client versions before V2.1. The most serious attack chains allow a low-privileged local user—or an attacker controlling a trusted SINEMA Remote Connect Server—to gain root-level control of the device, which bridges OT and IT environments and forwards process telemetry to SCADA systems.
Four additional flaws in the device’s PROFINET Discovery and basic Configuration Protocol daemon—CVE-2025-40575 through CVE-2025-40578, each rated CVSS 4.0 5.3—allow an unauthenticated attacker on the same Layer 2 segment to crash the service using crafted Ethernet packets. Exploitation can interrupt device discovery, configuration, and IP assignment, potentially making assets appear unreachable to SCADA systems. Operators should apply Siemens’ updated firmware and client releases, segment OT networks, and monitor for exposed or vulnerable LPE9403 devices.
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Siemens analyzed the reported issues, released patched SCALANCE LPE9403 firmware and remediation for the affected vulnerabilities, and published a security advisory. The updated LPE9403 firmware fixes the four PROFINET DCP vulnerabilities as well as the broader set of reported LPE9403 issues.
Nozomi Networks Labs disclosed that CVE-2025-40575 through CVE-2025-40578 affect the LPE9403's PROFINET DCP daemon. An unauthenticated adjacent-network attacker can send crafted Layer 2 Ethernet packets to crash the daemon, disrupting device discovery, configuration, or IP-address assignment.
Nozomi Networks Labs identified and responsibly disclosed 12 vulnerabilities affecting Siemens SCALANCE LPE9403 devices and the optional SINEMA Remote Connect Edge Client. Nine flaws affect LPE9403 firmware earlier than V4.0 HF0, including local privilege-escalation and memory-safety issues, while three affect SINEMA Edge Client versions earlier than V2.1.
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Siemens disclosed multiple vulnerabilities in **SICAM 8** industrial control system products affecting **CPCI85 Central Processing/Communication**, **RTUM85 RTU Base**, and the **SICORE Base system**, with vulnerable versions identified as releases prior to **V26.10** or **V26.10.0** depending on the product. The issues are tracked as **`CVE-2026-27663`** and **`CVE-2026-27664`**, and can allow denial-of-service conditions in operational technology environments. Siemens published advisory **`SSA-246443`**, while the Canadian Centre for Cyber Security and CISA both urged asset owners to review the vendor guidance and apply the recommended updates. According to CISA, **`CVE-2026-27663`** is a resource exhaustion flaw in remote operation mode that can block parameterization and may require a reset or reboot, while **`CVE-2026-27664`** is an out-of-bounds write triggered by specially crafted XML input that can crash the affected service. Siemens has released fixed versions and advised organizations to validate patches before deployment and harden network access with segmentation, firewalls, and VPNs; CISA further recommended minimizing internet exposure of control systems and isolating OT networks from business networks to reduce the risk of disruption.
Jun 29, 2026
A critical authentication bypass vulnerability, tracked as CVE-2025-40771 with a CVSS score of 9.8, has been discovered in Siemens SIMATIC CP and SIPLUS ET 200SP industrial communication modules. The flaw affects multiple device models, including SIMATIC CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1, as well as SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL, CP 1543SP-1 ISEC, and CP 1543SP-1 ISEC TX RAIL, specifically all versions prior to V2.4.24. The vulnerability arises from improper authentication of configuration connections, which allows unauthenticated remote attackers to gain access to sensitive configuration data on affected devices. This issue is particularly severe because it does not require any prior authentication, enabling attackers to exploit the flaw remotely without credentials. The vulnerability could be leveraged to compromise the integrity and confidentiality of industrial control systems that rely on these modules for network communication. Siemens has acknowledged the vulnerability and has released advisories to inform customers of the affected product versions. The flaw was reported by Siemens ProductCERT, and the company has urged users to update to the latest firmware version (V2.4.24 or later) to mitigate the risk. Exploitation of this vulnerability could allow attackers to alter device configurations, potentially disrupting industrial processes or enabling further attacks within operational technology environments. The vulnerability is considered critical due to the widespread use of these modules in industrial automation and the potential impact on critical infrastructure. Security researchers have highlighted the risk of remote exploitation, emphasizing the need for immediate patching and network segmentation to protect vulnerable devices. Organizations are advised to review their asset inventories to identify affected devices and prioritize remediation efforts. In addition to patching, Siemens recommends implementing network security best practices, such as restricting access to configuration interfaces and monitoring for unauthorized connection attempts. The disclosure of CVE-2025-40771 underscores the ongoing challenges in securing industrial control systems against remote attacks. The vulnerability was publicly disclosed in mid-October 2025, and security advisories have been disseminated to raise awareness among industrial operators. The incident highlights the importance of timely vulnerability management and the need for robust authentication mechanisms in critical infrastructure devices. Failure to address this vulnerability could result in significant operational disruptions and potential safety risks in industrial environments. The security community continues to monitor for signs of exploitation in the wild, and organizations are encouraged to stay informed about further updates from Siemens and relevant CERTs.
Jun 29, 2026
**Siemens published security advisories for multiple products**, prompting both CISA ICS advisories and a Canadian Centre for Cyber Security alert covering a broad set of affected industrial/engineering software and OT-adjacent components. Reported issues include a **stored XSS** in *Siemens Polarion* (CVE-2025-40587; CVSS 7.6) where authenticated users can inject JavaScript via crafted document titles, and **local privilege escalation** paths in *Siemens SINEC NMS* and its *User Management Component (UMC)* (CVE-2026-25655, CVE-2026-25656; CVSS 7.8) that allow low-privileged users to modify configuration/search paths to load malicious DLLs and potentially gain elevated execution (including SYSTEM-level impact). Siemens also addressed a **missing authorization** condition affecting *Siveillance Video Management Servers* Webhooks/MIP Webhooks API (CVSS 6.3), enabling a read-only user to obtain full API access. Additional advisories cover file-parsing and third-party component risks that can lead to crashes or potential code execution. *Siemens NX* is affected by multiple **CGM file parsing** flaws (CVE-2026-22923/22924/22925; CVSS 7.8) that can be triggered when a user opens a malicious file, and *Siemens Solid Edge* includes an **out-of-bounds read** in the PS/IGES Parasolid translator when processing crafted IGS files (CVSS 7.8). *Desigo CC* and *SENTRON Powermanager* are impacted via the third-party *WIBU Systems CodeMeter Runtime* chain tied to **CVE-2023-38545** (curl SOCKS5 heap overflow; CVSS 8.8), with Siemens providing component update instructions. *Siemens SINEC OS* before V3.3 aggregates a large set of third-party CVEs across supported platforms, and *Siemens COMOS* advisories include multiple issues (up to CVSS 10) spanning potential code execution, DoS, data exposure, and access control violations; Siemens recommends updating where fixes are available and applying countermeasures where they are not yet released.
Jun 29, 2026