CVE-2024-56181 Cert Portal CVE debrief

Who should care

Organizations running affected Siemens SIMATIC Field PG M5, IPC, or ITP1000 devices should care most, especially industrial operations teams, OT security teams, system integrators, and administrators responsible for firmware, secure boot, and device hardening. Assets exposed to privileged local access or shared maintenance workflows deserve immediate review.

Technical summary

The issue is described as insufficient protection for EFI variables stored on the device. The supplied CVSS 4.0 vector indicates a local attack path (AV:L) with low attack complexity, no user interaction, and high privileges required (PR:H). Siemens states that an authenticated attacker could directly interact with the flash controller to modify secure boot configuration without proper authorization. The reported impact is primarily integrity-focused, with high integrity and availability scores in the vector and downstream system impact also rated high.

Defensive priority

High. This is not a remotely exploitable flaw, but it can materially weaken the boot trust model on affected industrial systems if an attacker already has privileged local access. Prioritize systems that are difficult to reimage, critical to production, or exposed to shared maintenance access.

Recommended defensive actions

• Review Siemens ProductCERT advisory SSA-216014 for the affected product list, version thresholds, and vendor remediation guidance.
• Identify all listed SIMATIC devices in your environment, including those marked as affected in all versions, and confirm whether they are running vulnerable firmware/software.
• Restrict and monitor privileged local access to affected devices, especially maintenance accounts and physical servicing workflows.
• Validate secure boot and EFI variable protections on impacted systems as part of hardening and change-management checks.
• Apply vendor-provided updates or mitigations referenced in the official Siemens advisory where available.
• Prioritize replacement or remediation planning for devices with no stated fixed version in the advisory and track compensating controls until vendor guidance is applied.

Evidence notes

The vulnerability description, affected product list, and CVSS vector were taken from the supplied NVD record and its official Siemens ProductCERT reference. NVD reports the issue as VulnStatus: Deferred. The CVE was published on 2025-03-11 and later modified on 2026-05-12; those dates are used here only as record timing context.

Official resources