CVE-2024-37187 Advantech CVE debrief

Who should care

Organizations operating Advantech ADAM-5550 programmable logic controllers in industrial control system environments, particularly those with network segments accessible to potential threat actors or insufficient network segmentation.

Technical summary

The Advantech ADAM-5550 transmits user credentials using Base64 encoding without encryption. Base64 is a reversible encoding scheme, not a cryptographic protection, allowing credential recovery by any party with network visibility. The CVSS 3.1 vector (AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) indicates this is exploitable from adjacent networks with low complexity, requiring user interaction but no privileges, resulting in high confidentiality impact. The product is end-of-life; Advantech recommends upgrading to ADAM-5630 firmware 2.5.2+.

Defensive priority

medium

Recommended defensive actions

• Inventory all deployed Advantech ADAM-5550 units and assess exposure to adjacent network threats
• Plan migration to Advantech ADAM-5630 with firmware version 2.5.2 or higher per vendor guidance
• Segment ADAM-5550 devices from untrusted networks until migration is complete
• Monitor network traffic for unauthorized access attempts targeting ADAM-5550 management interfaces
• Review and rotate any credentials that may have been transmitted over monitored networks

Evidence notes

CISA advisory ICSA-24-270-01 confirms the credential encoding weakness and provides vendor remediation guidance. The CVSS vector indicates attack vector is adjacent network, attack complexity is low, and confidentiality impact is high.

Sources and references

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.