{"id":53985,"date":"2025-06-22T06:14:02","date_gmt":"2025-06-22T06:14:02","guid":{"rendered":""},"modified":"2025-09-10T11:55:36","modified_gmt":"2025-09-10T17:55:36","slug":"cve-2025-3052-critical-arbitrary-write-vulnerability-in-microsoft-s-uefi-firmware","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3052-critical-arbitrary-write-vulnerability-in-microsoft-s-uefi-firmware\/","title":{"rendered":"<strong>CVE-2025-3052: Critical Arbitrary Write Vulnerability in Microsoft\u2019s UEFI Firmware<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has recently catalogued a serious security flaw known as CVE-2025-3052. This hazard is an arbitrary write vulnerability that exists in Microsoft&#8217;s signed UEFI firmware. It is an alarming <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31398-critical-deserialization-of-untrusted-data-vulnerability-in-themeton-pimp-creative-multipurpose\/\"  data-wpil-monitor-id=\"60264\">vulnerability as it allows for the execution of untrusted<\/a> software, potentially leading to a full system compromise or data leakage. The ubiquity of Microsoft&#8217;s software means a large number of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5901-buffer-overflow-vulnerability-in-totolink-t10-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"60587\">systems globally are potentially<\/a> at risk. Therefore, understanding and mitigating this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40912-critical-vulnerability-in-cryptx-for-perl-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"60783\">vulnerability is crucial to ensure the security of these systems<\/a>.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-3052<br \/>\nSeverity: High (8.2 CVSS Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: High<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5978-critical-vulnerability-in-tenda-fh1202-1-2-0-14-potentially-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"61019\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3789477722\" 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: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\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: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\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: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Microsoft Signed UEFI Firmware | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49137-critical-vulnerability-in-hax-cms-php-prior-to-version-11-0-0\/\"  data-wpil-monitor-id=\"61951\">prior versions<\/a> to the patched update<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The CVE-2025-3052 exploit targets Microsoft&#8217;s UEFI firmware, exploiting an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4387-arbitrary-file-upload-vulnerability-in-abandoned-cart-pro-for-woocommerce-plugin\/\"  data-wpil-monitor-id=\"60629\">arbitrary write vulnerability<\/a>. The flaw <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52921-critical-vulnerability-in-innoshop-allows-code-execution-by-authenticated-attackers\/\"  data-wpil-monitor-id=\"63501\">allows an attacker to execute<\/a> untrusted software, which can then control the value of the signed UEFI firmware. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-4994-critical-csrf-vulnerability-in-gitlab-s-graphql-api-leading-to-arbitrary-graphql-mutations\/\"  data-wpil-monitor-id=\"63726\">leads to arbitrary<\/a> memory writes, including the modification of critical firmware settings stored in NVRAM. With these controls, an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22236-minion-event-bus-authorization-bypass-vulnerability-posing-serious-security-threats\/\"  data-wpil-monitor-id=\"63349\">bypass security<\/a>, establish persistence mechanisms, or compromise the entire system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3655808173\" 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>This is a conceptual pseudocode example of how an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"60923\">attacker might exploit<\/a> this vulnerability:<\/p>\n<pre><code class=\"\" data-line=\"\">function exploit() {\n\/\/ Get a handle to the firmware variable\nvar firmwareVar = getFirmwareVar(&quot;Microsoft Signed UEFI Firmware&quot;);\n\/\/ Write an arbitrary value to the firmware variable\nwriteFirmwareVar(firmwareVar, &quot;malicious_code&quot;);\n\/\/ Execute the malicious code\nexecuteCode(firmwareVar);\n}<\/code><\/pre>\n<p>This pseudocode illustrates how an attacker might potentially gain access to the firmware variable, write arbitrary values to it, and then <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47163-unauthorized-code-execution-through-microsoft-sharepoint-deserialization-vulnerability\/\"  data-wpil-monitor-id=\"60965\">execute malicious code<\/a>. Please note that this is a simplified representation of the exploit and the actual attack would involve complex techniques and precise knowledge of the firmware.<\/p>\n<p><strong>Mitigation and Countermeasures<\/strong><\/p>\n<p>The primary mitigation method against CVE-2025-3052 is applying the vendor&#8217;s patch. It is highly recommended that all users of the affected <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53786-microsoft-exchange-server-security-vulnerability-in-hybrid-deployments\/\"  data-wpil-monitor-id=\"81278\">Microsoft signed UEFI firmware apply the latest security<\/a> updates as soon as possible. In the interim, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be employed as temporary mitigation. These tools can monitor and block <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5491-acer-controlcenter-remote-code-execution-vulnerability-potential-system-compromise\/\"  data-wpil-monitor-id=\"61246\">potential exploit attempts on the vulnerable<\/a> firmware.<br \/>\nPlease consult your system administrator or cybersecurity team to ensure the appropriate defences are in place. Awareness and timely action are the best defence against this high <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30220-high-severity-xml-external-entity-xxe-vulnerability-in-geoserver-geotools-and-geonetwork\/\"  data-wpil-monitor-id=\"60586\">severity vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has recently catalogued a serious security flaw known as CVE-2025-3052. This hazard is an arbitrary write vulnerability that exists in Microsoft&#8217;s signed UEFI firmware. It is an alarming vulnerability as it allows for the execution of untrusted software, potentially leading to a full system compromise or data [&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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-53985","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53985","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=53985"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53985\/revisions"}],"predecessor-version":[{"id":73727,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53985\/revisions\/73727"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53985"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53985"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53985"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53985"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53985"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53985"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}