{"id":59509,"date":"2025-07-20T07:07:43","date_gmt":"2025-07-20T07:07:43","guid":{"rendered":""},"modified":"2025-10-02T23:37:09","modified_gmt":"2025-10-03T05:37:09","slug":"cve-2025-7026-critical-firmware-vulnerability-enabling-privilege-escalation","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7026-critical-firmware-vulnerability-enabling-privilege-escalation\/","title":{"rendered":"<strong>CVE-2025-7026: Critical Firmware Vulnerability Enabling Privilege Escalation<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-7026 vulnerability represents a significant threat to system integrity and data security due to its potential for privilege escalation and persistent firmware compromise. This security flaw exists in the Software SMI handler, specifically the SwSmiInputValue 0xB2, and poses a risk to any systems utilizing this software component. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49886-critical-php-local-file-inclusion-vulnerability-in-webgeniuslab-zikzag-core\/\"  data-wpil-monitor-id=\"66128\">vulnerability allows an attacker with local<\/a> access to manipulate the RBX register, enabling arbitrary writes to System Management RAM (SMRAM). This exploit could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7419-critical-vulnerability-discovered-in-tenda-o3v2-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"69212\">lead to a substantial increase in system<\/a> privileges, potentially granting the attacker the ability to operate in System Management Mode (SMM) and thereby carry out more sophisticated and damaging attacks.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-7026<br \/>\nSeverity: High (8.2)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7027-critical-firmware-vulnerability-enabling-arbitrary-memory-writes-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"69421\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1626045281\" 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>(To be updated as vendors report) | (To be updated as vendors report)<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42959-unauthenticated-replay-attack-exploiting-hmac-reuse\/\"  data-wpil-monitor-id=\"73812\">exploit revolves around the attacker&#8217;s<\/a> ability to control the RBX register, which is used unchecked in the CommandRcx0 function. If the attacker can manipulate the content at RBX to match specific values (such as &#8216;$DB$&#8217; or &#8216;2DB$&#8217;), the function will perform <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40738-critical-arbitrary-file-write-vulnerability-in-sinec-nms\/\"  data-wpil-monitor-id=\"66562\">arbitrary writes<\/a> to SMRAM. This potentially allows the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7695-privilege-escalation-vulnerability-in-dataverse-integration-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"69211\">escalate their privileges<\/a> to SMM, leading to a persistent firmware compromise.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1723633765\" 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>It&#8217;s hard to provide a concrete example <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8028-critical-vulnerability-in-firefox-and-thunderbird-due-to-incorrect-computation-of-branch-address\/\"  data-wpil-monitor-id=\"73811\">due to the low-level nature of this vulnerability<\/a>, but conceptually, an attacker might attempt to manipulate the RBX register using a malicious script like this:<\/p>\n<pre><code class=\"\" data-line=\"\"># A conceptual shell command to set the RBX register\necho -n -e &#039;\\xDB&#039; &gt; \/proc\/sys\/kernel\/smi_handler\/rbx_value<\/code><\/pre>\n<p>Please note that this is a conceptual demonstration of how the exploit might work and not an actual exploit code. The actual exploit would likely require much more sophisticated programming, including the ability to execute <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25214-race-condition-vulnerability-in-wwbn-avideo-14-4-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"69213\">arbitrary code<\/a> on the victim&#8217;s machine.<\/p>\n<p><strong>Mitigation Measures<\/strong><\/p>\n<p>Users are advised to apply patches from their <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-26383-critical-vulnerability-in-amd-tee-puts-system-integrity-and-data-availability-in-jeopardy\/\"  data-wpil-monitor-id=\"88034\">system or software vendors as soon as they become available<\/a>. In the interim, employing Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) can provide a temporary mitigation measure against <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46334-critical-vulnerability-in-git-gui-enables-potential-system-compromise\/\"  data-wpil-monitor-id=\"70707\">potential attacks exploiting this vulnerability<\/a>. Regular system audit, and monitoring for unusual activity can also help in early detection of any potential breach.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-7026 vulnerability represents a significant threat to system integrity and data security due to its potential for privilege escalation and persistent firmware compromise. This security flaw exists in the Software SMI handler, specifically the SwSmiInputValue 0xB2, and poses a risk to any systems utilizing this software component. The vulnerability allows an attacker with [&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":[88],"product":[95],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-59509","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-linux","product-linux-kernel","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59509","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=59509"}],"version-history":[{"count":7,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59509\/revisions"}],"predecessor-version":[{"id":80850,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59509\/revisions\/80850"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59509"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59509"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59509"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59509"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59509"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59509"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}