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PatchSiren cyber security CVE debrief

CVE-2024-13089 Siemens CVE debrief

An OS command injection vulnerability exists in the update functionality of Siemens RUGGEDCOM APE1808, which runs Nozomi Networks Guardian and CMC software. The flaw stems from an improper signature validation check on update packages. While updates are cryptographically signed and signatures are validated before installation, the validation logic is flawed, allowing an authenticated administrator to upload a malicious update package that bypasses signature checks. This enables arbitrary OS command execution on the appliance with administrative privileges, impacting confidentiality, integrity, and availability. The vulnerability requires network access and administrative privileges but does not require user interaction. The issue was disclosed on August 12, 2025, with a vendor fix available in Nozomi Guardian/CMC V25.4.0.

Vendor
Siemens
Product
RUGGEDCOM APE1808
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-12
Original CVE updated
2026-01-14
Advisory published
2025-08-12
Advisory updated
2026-01-14

Who should care

Organizations operating Siemens RUGGEDCOM APE1808 appliances with Nozomi Networks Guardian or CMC deployments, particularly in critical infrastructure and industrial control system environments. Security teams responsible for OT/ICS asset management, patch management personnel, and network administrators with administrative access to these appliances should prioritize this vulnerability due to the potential for complete system compromise.

Technical summary

The vulnerability exists in the update package handling mechanism where signature validation is performed but contains a flaw that allows bypass. An authenticated administrator can upload a crafted update package that passes the flawed validation, leading to arbitrary OS command execution during the update installation process. The attack requires administrative privileges on the target system and network access to the appliance's management interface. The CVSS 3.1 score of 7.2 (HIGH) reflects the significant impact potential despite the high privilege requirement, given the complete compromise of confidentiality, integrity, and availability that results from successful exploitation.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade Nozomi Guardian/CMC to V25.4.0 using CLI rather than Web GUI to avoid potential errors during the upgrade process
  • Contact Nozomi Networks customer support to obtain patch and update information
  • Only install update packages from trusted sources and verify package integrity through alternative means where possible
  • Restrict administrative access to the appliance to only essential personnel and implement strong authentication controls
  • Monitor for unauthorized update package uploads or unexpected system behavior that may indicate exploitation attempts
  • Apply network segmentation to limit exposure of ICS/OT devices and follow CISA ICS recommended practices for defense in depth

Evidence notes

The vulnerability description indicates that update packages are signed and signatures are validated, but an improper signature validation check allows bypass. The affected product is Siemens RUGGEDCOM APE1808 running Nozomi Networks Guardian and CMC. The CVSS vector AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H confirms network attack vector, low attack complexity, high privileges required, no user interaction, and high impact across CIA triad. The vendor fix specifies upgrade to V25.4.0 with CLI recommended over Web GUI for the upgrade process.

Official resources

2025-08-12