Critical Remote Code Execution Vulnerabilities (CVE‑2024‑42384 – CVE‑2026‑62654) in Siemens Reyrolle 7SR5 Industrial Control System
What It Is – Siemens Reyrolle 7SR5 firmware versions prior to V2.70 contain a suite of fourteen high‑severity flaws (integer overflows, authentication bypass, out‑of‑bounds writes, missing integrity checks, etc.) that enable remote code execution, denial‑of‑service, and unauthorized configuration changes.
Exploitability – CVSS v3.1 9.8 (Critical). Public advisories indicate that the vulnerabilities are exploitable over the network; proof‑of‑concept exploits have been published for several CVEs.
Affected Products – Siemens Reyrolle 7SR5 (all releases < V2.70) deployed in energy‑sector control networks worldwide.
Why It Matters for Trust & Control Assurance
- Vulnerability Management – Demonstrates the need for continuous monitoring of firmware versions and rapid patch deployment to satisfy the control objective of “maintain a documented, auditable patch‑management process.”
- Evidence of Due Diligence – Maintaining verifiable records of patch status provides defensible audit evidence across frameworks (e.g., NIST CSF 2.0, ISO 27001).
- Operational Continuity – Unpatched control‑system firmware can be leveraged to disrupt critical energy services, directly impacting the trust that regulators and customers place in the operator’s security posture.
Recommended Actions
- Inventory all Reyrolle 7SR5 devices and verify current firmware version.
- Apply Siemens‑provided update to version 2.70 or later immediately.
- Validate the update with functional testing and integrity checks.
- Record patch‑deployment dates, device IDs, and verification results in a centralized CMDB for audit readiness.
- Integrate automated firmware‑version scanning into your continuous control monitoring platform.
Source: CISA Advisory – ICSA‑26‑258‑05