U.S. CISA adds Ubiquiti UniFi OS and Lantronix EDS5000 plugin flaws to its Known Exploited Vulnerabilities catalog

CVE-2025-67038 is an OS command injection flaw (CWE-78) in the HTTP RPC module of Lantronix EDS5000 series device servers, with firmware 2.1.0.0R3 confirmed affected. When a login attempt fails, the module writes a log entry by building a shell command that directly concatenates the username from the request without any sanitization, so an attacker who sends a crafted username in an authentication request gets their commands appended to it. Because the log-writing command runs as root, an unauthenticated, network-reachable attacker gains full command execution with the highest privileges on the device. Any organization running network-exposed Lantronix EDS5000 device/console servers (EDS5008, EDS5016, EDS5032, and the G526/G527-series variants) is affected. CISA added the flaw to its Known Exploited Vulnerabilities catalog on 2026-06-23 and reports it is being actively exploited; the EPSS score of 19.3% (97th percentile) reflects a high near-term exploitation risk.

Do: Upgrade EDS5000-series firmware to a patched release per Lantronix's guidance, since no fixed version is specified in the available data and 2.1.0.0R3 is confirmed vulnerable; if patching is not yet possible, restrict HTTP access to the device's management interface at the network level. Federal agencies must apply vendor mitigations per CISA BOD 26-04 requirements following the 2026-06-23 KEV listing. Check device logs and configs for signs of compromise, since successful injection yields root-level command execution.

CVE-2026-34910 is an improper input validation flaw (CWE-20) in Ubiquiti UniFi OS that allows command injection on affected gateways and network video recorders. A malicious actor with network access to the device can send crafted, unvalidated input that triggers arbitrary command execution, with no privileges or user interaction required (CVSS 3.1 base score 10.0, network vector, scope changed). Successful exploitation grants full control of the device — high confidentiality, integrity, and availability impact — and can serve as a foothold into the attached network. Affected products span the UniFi gateway and recording line: UniFi OS Server, Cloud Gateway Industrial, Dream Machine/Pro/Special Edition/Pro Max, Enterprise Fortress Gateway, Dream Wall, Dream Router and Dream Router 7, UniFi Express 7, and the UniFi Network Video Recorder. CISA added the flaw to the Known Exploited Vulnerabilities catalog on 2026-06-23, public reporting describes in-the-wild exploitation being used to build a Mirai botnet, and EPSS estimates an 87.5% chance of exploitation within 30 days.

Do: Upgrade all listed UniFi OS devices to the fixed firmware in Ubiquiti's June 2026 security advisory (consult the vendor advisory for exact fixed versions per product), and per CISA BOD 26-04 patch within the required window or discontinue use of affected cloud-reachable assets. Restrict device management interfaces (UniFi Network UI, SSH, API) to trusted networks and audit internet-facing gateways for signs of compromise, including Mirai botnet traffic or unexpected outbound connections.