{"id":87103,"date":"2026-06-12T06:57:44","date_gmt":"2026-06-12T06:57:44","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-21587-critical-vulnerability-in-oracle-java-se-and-oracle-graalvm","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-21587-critical-vulnerability-in-oracle-java-se-and-oracle-graalvm\/","title":{"rendered":"<strong>CVE-2025-21587: Critical Vulnerability in Oracle Java SE and Oracle GraalVM<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-21587 is a critical vulnerability found in Oracle&#8217;s Java SE and GraalVM products. The vulnerability allows an unauthenticated attacker to compromise these systems through network access, leading to potential unauthorized access, modification, or deletion of critical data. This vulnerability has a significant impact as it can lead to system compromise or data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-21587<br \/>\nSeverity: High (CVSS 7.4)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Unauthorized creation, deletion, or modification access to critical data or all accessible data, and unauthorized access to critical data or complete access to all accessible data.<\/p>\n<p><strong>Affected Products<\/strong><\/p>\n<p>Product | Affected Versions<\/p>\n<p>Oracle Java SE | 8u441, 8u441-perf, 11.0.26, 17.0.14, 21.0.6, 24<br \/>\nOracle GraalVM for JDK | 17.0.14, 21.0.6, 24<br \/>\nOracle GraalVM Enterprise Edition | 20.3.17, 21.3.13<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability can be exploited by an unauthenticated attacker with network access via multiple protocols. This exploit primarily targets the JSSE component of Oracle&#8217;s Java SE and GraalVM. APIs in the JSSE component can be manipulated through a web service supplying data to these APIs. This exploit can be used in Java deployments that load and run untrusted code and rely on the Java sandbox for security.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p>\n<pre><code class=\"language-http\">POST \/vulnerable\/JSSE_API HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n\"malicious_payload\": \"untrusted code causing unauthorized data access or modification\"\n}<\/code><\/pre>\n<p>This conceptual example shows how an attacker might send a malicious payload to the vulnerable JSSE API, leading to unauthorized data access or modification.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-21587 is a critical vulnerability found in Oracle&#8217;s Java SE and GraalVM products. The vulnerability allows an unauthenticated attacker to compromise these systems through network access, leading to potential unauthorized access, modification, or deletion of critical data. This vulnerability has a significant impact as it can lead to system compromise or data leakage. Vulnerability [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87103","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Overview CVE-2025-21587 is a critical vulnerability found in Oracle&#039;s Java SE and GraalVM products. 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