Siemens RUGGEDCOM APE1808

Act NowCVSS 9.8ICS-CERT ICSA-25-044-06Feb 11, 2025

SiemensManufacturing

Attack path

Attack VectorNetwork

Auth RequiredNone

ComplexityLow

User InteractionNone needed

Summary

Siemens RUGGEDCOM APE1808 contains multiple critical vulnerabilities including memory corruption flaws (buffer overflows, out-of-bounds access), authentication bypass, and integer overflow weaknesses. These allow an unauthenticated attacker on the network to execute arbitrary code with full device privileges. The vulnerabilities are in low-complexity network-reachable code paths and require no user interaction. Siemens is releasing a patched version and recommends immediate update. Users should contact Siemens customer support for patch availability, restrict network access to the device, isolate it from untrusted networks, and disable unnecessary remote management features.

What this means

What could happen

An unauthenticated attacker on the network can execute arbitrary code on the RUGGEDCOM APE1808, allowing them to modify network configurations, intercept traffic, or disable the device entirely. This could disrupt industrial network operations and compromise the integrity of critical infrastructure.

Who's at risk

Manufacturing facilities and utilities that operate Siemens RUGGEDCOM APE1808 industrial Ethernet switches should treat this as critical. The APE1808 is a hardened network appliance commonly deployed in factory automation, power distribution, and water/wastewater systems to provide secure communication between PLCs, SCADA systems, and field devices. Any organization relying on this device for network infrastructure in industrial environments is at immediate risk.

How it could be exploited

An attacker reaches the APE1808 via the network without needing credentials or user interaction. They exploit one of multiple memory corruption or authentication bypass vulnerabilities to run arbitrary commands on the device. Once in control, they can reconfigure the industrial network switch's behavior, alter traffic routing, or shut down network services.

Prerequisites

Network access to the RUGGEDCOM APE1808 device (does not need to be from the internet; local industrial network access is sufficient)
No authentication required
The device must be running a vulnerable firmware version (all current versions affected)

Remotely exploitable without authenticationNo user interaction required for exploitationLow complexity attackActively exploited in the wild (KEV status)EPSS exploit probability 94% (extremely high)Memory corruption vulnerabilities affect multiple attack pathsNo patch currently available—vendor still releasing fix detailsAffects critical industrial network infrastructure

Exploitability

Actively exploited — confirmed by CISA KEV

Public Proof-of-Concept (PoC) on GitHub (10 repositories)

Affected products (1)

ProductAffected VersionsFix Status

RUGGEDCOM APE1808All versionsNo fix yet

Remediation & Mitigation

0/4

Do now

0/3

HOTFIXContact Siemens customer support immediately to obtain and deploy the patched firmware for RUGGEDCOM APE1808. Schedule the firmware update during a maintenance window to minimize production disruption.

WORKAROUNDImplement network access controls to restrict traffic to the RUGGEDCOM APE1808 to only authorized industrial engineering workstations and management stations. Use firewall rules or industrial network switches to limit Layer 3 access by source IP.

HARDENINGIsolate the industrial network containing the APE1808 from the business network using a firewall or air-gap. Ensure the device is not directly or indirectly reachable from the internet or untrusted networks.

Schedule — requires maintenance window

0/1

Patching may require device reboot — plan for process interruption

HARDENINGDisable remote management features (such as web console access, SSH, or Telnet) if they are not required for operations. If remote access is necessary, restrict it to a secure VPN with strong authentication.

CVEs (30)

View full CISA ICS-CERT advisory

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