
Moxa AIG-302 ThingsPro Edge: Two ICS Vulnerabilities Put OT Cryptographic Keys and API Secrets at Risk
On October 20, 2026, CISA published ICS Advisory ICSA-26-293-03 disclosing two critical vulnerabilities in the Moxa AIG-302 ThingsPro Edge industrial IoT gateway running firmware version 1.4.0 and earlier. CVE-2026-109812 (CVSS 6.8) exposes a missing authorization flaw in the internal API endpoint /api/v1/secrets/, allowing a privileged but low-trust attacker with adjacent network access to retrieve cryptographic key material and sensitive configuration data. CVE-2026-109813 (CVSS 8.1) reveals a hard-coded cryptographic key embedded in /usr/bin/sysman, enabling an unauthenticated adjacent-network attacker to compromise both the confidentiality and integrity of all device communications. Both flaws are addressed in firmware v1.4.1, released by Moxa under security advisory MPSA-262560. Affected deployments span critical manufacturing, energy, and water and wastewater sectors worldwide. These vulnerabilities arrive amid intensifying scrutiny of OT/ICS supply-chain security, where hard-coded credentials and weak access controls in edge devices continue to serve as reliable pivot points for nation-state and ransomware actors targeting industrial infrastructure. The Cybersecurity and Infrastructure Security Agency's active advisory cadence signals growing regulatory urgency around ICS device hygiene and adjacent-network threat surfaces.
Kill Chain


