{"id":28354,"date":"2025-04-21T14:33:59","date_gmt":"2025-04-21T14:33:59","guid":{"rendered":""},"modified":"2025-06-20T23:21:03","modified_gmt":"2025-06-21T05:21:03","slug":"cve-2025-26959-privilege-escalation-vulnerability-in-quy-le-91-administrator-z","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-26959-privilege-escalation-vulnerability-in-quy-le-91-administrator-z\/","title":{"rendered":"<strong>CVE-2025-26959: Privilege Escalation Vulnerability in Qu\u00fd L\u00ea 91 Administrator Z<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-26959 is a critical security vulnerability in the Qu\u00fd L\u00ea 91 Administrator Z software that could potentially lead to system compromise or data leakage. The issue stems from a missing authorization vulnerability, allowing an attacker to escalate their privileges on the system. This is a <a href=\"https:\/\/www.ameeba.com\/blog\/exaforce-s-75-million-fundraise-a-significant-move-in-the-cybersecurity-industry\/\"  data-wpil-monitor-id=\"32760\">significant cybersecurity<\/a> concern, as it affects all versions of Administrator Z up until 2025.03.24. The impact of this vulnerability can be severe, with potential consequences including unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23389-improper-access-control-vulnerability-in-suse-rancher\/\"  data-wpil-monitor-id=\"33354\">access to sensitive data and control<\/a> over affected systems.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-26959<br \/>\nSeverity: Critical (8.8 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23391-incorrect-privilege-assignment-in-suse-rancher-potentially-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"33064\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2183823215\" 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>Qu\u00fd L\u00ea 91 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2775-unauthenticated-xxe-vulnerability-in-sysaid-on-prem-versions-leading-to-administrator-account-takeover\/\"  data-wpil-monitor-id=\"43819\">Administrator Z | All versions<\/a> up to and including 2025.03.24<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5894-critical-missing-authorization-vulnerability-in-smart-parking-management-system\/\"  data-wpil-monitor-id=\"60151\">missing authorization<\/a> check in the Qu\u00fd L\u00ea 91 Administrator Z software. This oversight allows an attacker, who already has low-level privileges on the system, to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3418-privilege-escalation-vulnerability-in-wpc-admin-columns-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"33554\">escalate their privileges<\/a> without being detected.<br \/>\nThe attacker can do this by sending specially crafted requests to the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37297-vulnerability-in-ami-s-spx-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"33418\">vulnerable system<\/a>. These requests are designed to bypass the normal authorization checks that should prevent a low-privileged <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2563-privilege-escalation-vulnerability-in-user-registration-membership-wordpress-plugin\/\"  data-wpil-monitor-id=\"35832\">user from gaining higher privileges<\/a>. Once the attacker has escalated their privileges, they can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50350-broken-cryptographic-algorithm-leads-to-potential-data-leakage-in-hcl-dryice-myxalytics\/\"  data-wpil-monitor-id=\"33687\">potentially compromise the system or cause data leakage<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2744851615\" 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>Below is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-50123-exploitable-vulnerability-in-hozard-alarm-system-sms-authentication\/\"  data-wpil-monitor-id=\"35481\">vulnerability might be exploited<\/a>. This is a simplified version of a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-48263-unauthenticated-remote-attack-leading-to-dos-and-potential-rce\/\"  data-wpil-monitor-id=\"34371\">potential HTTP request an attacker<\/a> could use:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/admin\/escalate_privileges HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;user_id&quot;: &quot;attacker&quot;, &quot;desired_privilege_level&quot;: &quot;admin&quot; }<\/code><\/pre>\n<p>In this example, the attacker is sending a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5739-critical-buffer-overflow-vulnerability-in-totolink-x15-http-post-request-handler\/\"  data-wpil-monitor-id=\"60152\">POST request<\/a> to the `\/admin\/escalate_privileges` endpoint. The JSON payload contains the attacker&#8217;s user id and the desired <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26741-privilege-escalation-through-missing-authorization-in-aweos-gmbh-email-notifications-for-updates\/\"  data-wpil-monitor-id=\"34640\">privilege level they wish to escalate<\/a> to. This request could potentially bypass the missing authorization check, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-6631-powersystem-center-vulnerability-could-allow-privilege-escalation\/\"  data-wpil-monitor-id=\"43344\">allowing the attacker to gain admin privileges<\/a>.<br \/>\nPlease note that this is a conceptual example, actual exploit code would be more complex and tailored to the specific weaknesses in the software.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, users of Qu\u00fd L\u00ea 91 Administrator Z should apply the vendor patch as soon as possible. This patch should correct the missing authorization check, preventing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28399-privilege-escalation-vulnerability-in-erick-xmall\/\"  data-wpil-monitor-id=\"35480\">privilege escalation<\/a>.<br \/>\nIf the vendor patch cannot be applied immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation. These tools can monitor network traffic for suspicious activity, such as attempts to exploit this vulnerability, and block these attempts before they reach the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0213-buffer-overflow-vulnerability-in-ta-for-linux-and-macos-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"33898\">vulnerable system<\/a>. However, this should be seen as a temporary solution until the vendor patch can be applied.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-26959 is a critical security vulnerability in the Qu\u00fd L\u00ea 91 Administrator Z software that could potentially lead to system compromise or data leakage. The issue stems from a missing authorization vulnerability, allowing an attacker to escalate their privileges on the system. This is a significant cybersecurity concern, as it affects all versions of [&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":[],"product":[],"attack_vector":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-28354","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/28354","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=28354"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/28354\/revisions"}],"predecessor-version":[{"id":53854,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/28354\/revisions\/53854"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=28354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=28354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=28354"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=28354"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=28354"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=28354"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=28354"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=28354"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=28354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}