PatchSiren cyber security CVE debrief

CVE-2024-49963 Siemens CVE debrief

A vulnerability in the Broadcom BCM2835 mailbox driver affects Siemens industrial networking products running SINEC OS. The flaw causes a timeout during system suspend mode, potentially leading to denial of service conditions. The vulnerability requires local access with low privileges and has been assigned a CVSS 3.1 score of 5.5 (Medium severity). Siemens has released firmware updates to address this issue in affected RUGGEDCOM and SCALANCE product families.

Vendor: Siemens
Product: RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS: MEDIUM 5.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2025-08-12
Original CVE updated: 2026-02-25
Advisory published: 2025-08-12
Advisory updated: 2026-02-25

Who should care

Organizations operating Siemens RUGGEDCOM RST2428P switches or SCALANCE XC/XR/XCM/XRM/XCH/XRH industrial Ethernet switches in critical infrastructure environments, particularly those in energy, manufacturing, and transportation sectors where device availability is essential for operational continuity.

Technical summary

The vulnerability exists in the BCM2835 mailbox driver, a Linux kernel component for Broadcom VideoCore communication. During system suspend operations, the driver experiences a timeout condition that can cause system instability or denial of service. The flaw is triggered when the system attempts to enter suspend mode while mailbox operations are pending. Affected Siemens products incorporate this vulnerable kernel component through their SINEC OS firmware. The attack requires authenticated local access with low privileges, limiting exploitation to scenarios where an attacker already has foothold access to the device. No confidentiality or integrity impacts are associated with this vulnerability; only availability is affected.

Defensive priority

medium

Recommended defensive actions

Apply vendor-provided firmware updates to V3.2 or later for affected RUGGEDCOM and SCALANCE devices
For SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, consult Siemens ProductCERT advisory SSA-355557 for specific configuration guidance
Implement physical access controls to limit local access to affected industrial control systems
Monitor for anomalous system behavior during suspend/resume operations
Review and apply CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

CVE published 2025-08-12 per CISA CSAF advisory ICSA-25-226-07. Modified 2026-02-25. Affects Siemens RUGGEDCOM RST2428P and SCALANCE XC/XR/XCM/XRM/XCH/XRH families running SINEC OS. CVSS vector confirms local attack vector with availability impact.

Sources and references

Verified primary and authoritative sources

CVE-2024-49963 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2024-49963

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2024-49963 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2024-49963

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source item URL
Unverified legacy reference

URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-226-07.json

cisa_csaf
Source reference
Unverified legacy reference

URL: https://cert-portal.siemens.com/productcert/csaf/ssa-355557.json

Reference
Source reference
Unverified legacy reference

URL: https://cert-portal.siemens.com/productcert/html/ssa-355557.html

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-07

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/topics/industrial-control-systems

Reference
Source reference
Unverified legacy reference

URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.