A China-linked threat actor sustained multi-year undetected access to Southeast Asian military networks using novel backdoors and living-off-the-land tradecraft; no specific vendor products or CVEs are identified in available reporting. Risk is primarily relevant to organizations in defense, government, and Asia-Pacific critical infrastructure sectors, where similar pre-positioned access may exist undetected. No discrete vendor remediation applies; recommended response is behavioral threat hunting against LOTL execution patterns, persistence mechanism audits, privileged account reviews, and C2 traffic analysis as detailed in the associated campaign item.