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CVE-2024-26008 Siemens CVE debrief

CVE-2024-26008 is a medium-severity vulnerability (CVSS 5.3) affecting the Fortinet FortiGate Management Protocol (fgfm) daemon. The vulnerability stems from improper handling of exceptional conditions (CWE-703) in FortiOS, FortiProxy, FortiPAM, and FortiSwitchManager products. An unauthenticated attacker can exploit this flaw by sending crafted SSL-encrypted TCP requests to repeatedly reset the fgfm connection, resulting in a denial-of-service condition. The vulnerability was disclosed on July 9, 2024, and affects FortiOS versions 7.4.0 through 7.4.3 and before 7.2.7, FortiProxy versions 7.4.0 through 7.4.3 and before 7.2.9, FortiPAM before 1.2.0, and FortiSwitchManager versions 7.2.0 through 7.2.3 and 7.0.0 through 7.0.3. Siemens RUGGEDCOM APE1808 devices incorporate affected Fortinet NGFW components and are consequently vulnerable. The vendor fix requires updating the Fortigate NGFW component to version 7.4.4, with customers directed to contact Siemens customer support to obtain patch and update information.

Vendor
Siemens
Product
RUGGEDCOM APE1808
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2024-07-09
Original CVE updated
2026-01-14
Advisory published
2024-07-09
Advisory updated
2026-01-14

Who should care

Organizations operating Siemens RUGGEDCOM APE1808 devices in industrial control system (ICS) environments, particularly those with exposed or inadequately segmented management interfaces. Security teams responsible for OT/ICS infrastructure availability and network administrators managing Fortinet-based security components within industrial networks.

Technical summary

The fgfm (FortiGate Management Protocol) daemon contains an improper exception handling vulnerability that fails to properly validate or handle exceptional conditions when processing SSL-encrypted TCP requests. This allows an unauthenticated remote attacker to craft malicious requests that trigger repeated connection resets, disrupting management connectivity. The vulnerability affects multiple Fortinet product lines integrated into Siemens RUGGEDCOM APE1808 industrial networking devices.

Defensive priority

medium

Recommended defensive actions

  • Contact Siemens customer support to obtain Fortigate NGFW V7.4.4 patch and update information for RUGGEDCOM APE1808 devices
  • Review network segmentation to limit exposure of fgfm management interfaces to untrusted networks
  • Monitor for repeated connection resets on fgfm daemon as potential exploitation indicator
  • Apply defense-in-depth strategies per ICS-CERT recommended practices for industrial control systems

Evidence notes

CVE description and affected product versions derived from CISA CSAF advisory ICSA-24-193-02. Vendor attribution to Siemens and product identification as RUGGEDCOM APE1808 confirmed through CSAF product tree. Remediation guidance specifies Fortigate NGFW update to V7.4.4 with customer support contact for patch delivery. Advisory revision history shows CVE-2024-26008 was added in Revision 9 on November 11, 2025.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-26008 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-26008

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-26008 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-26008

    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/2024/icsa-24-193-02.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-698820.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-698820.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-193-02

    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.