{"id":75195,"date":"2025-09-15T13:20:37","date_gmt":"2025-09-15T13:20:37","guid":{"rendered":""},"modified":"2025-10-02T16:42:41","modified_gmt":"2025-10-02T22:42:41","slug":"cve-2025-40804-unauthenticated-network-share-exposure-in-simatic-virtualization-as-a-service-sivaas","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-40804-unauthenticated-network-share-exposure-in-simatic-virtualization-as-a-service-sivaas\/","title":{"rendered":"<strong>CVE-2025-40804: Unauthenticated Network Share Exposure in SIMATIC Virtualization as a Service (SIVaaS)<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The vulnerability, identified as CVE-2025-40804, is a serious security issue affecting all versions of SIMATIC Virtualization as a Service (SIVaaS). This vulnerability poses a significant risk as it allows potential attackers unauthenticated access to a network share, thereby providing a gateway to access or alter sensitive data without proper authorization.<br \/>\nGiven its wide-ranging impact on <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8067-udisks-daemon-vulnerability-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"85768\">data security and system<\/a> integrity, this vulnerability is of considerable concern to organizations using SIVaaS and warrants immediate attention and remediation. It scores a high 9.1 on the CVSS Severity Score, indicating its critical nature.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-40804<br \/>\nSeverity: Critical (CVSS: 9.1)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9253-stack-based-buffer-overflow-on-linksys-wi-fi-range-extenders-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"84253\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2910119240\" 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>SIMATIC Virtualization as a Service (SIVaaS) | All versions<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability stems from an exposed <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-52786-authentication-bypass-vulnerability-in-anji-plus-aj-report\/\"  data-wpil-monitor-id=\"82665\">network share<\/a> in SIVaaS that lacks proper authentication mechanisms. This means that an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8857-unauthenticated-remote-access-due-to-hard-coded-credentials-in-clinic-image-system\/\"  data-wpil-monitor-id=\"86306\">access the network share without needing any login credentials<\/a>. Once inside, they can view, modify, or delete sensitive data, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-45134-critical-vulnerability-in-mahara-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"82990\">potentially leading to a system<\/a> compromise or data leakage. This could be used as a launchpad for further attacks, including the propagation of malware or ransomware within the network.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-220789808\" 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>While specific exploit <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53518-an-integer-overflow-vulnerability-leading-to-arbitrary-code-execution-in-the-biosig-project-libbiosig\/\"  data-wpil-monitor-id=\"83251\">code for this vulnerability<\/a> is not provided, a conceptual example of an exploit attempt might look like the following shell command, which attempts to connect to the network share:<\/p>\n<pre><code class=\"\" data-line=\"\">net use \\\\target.system.com\\share \/user:Anonymous<\/code><\/pre>\n<p>In this example, &#8220;target.system.com&#8221; represents the target system&#8217;s address, and &#8220;share&#8221; is the exposed network share. The &#8220;\/user:Anonymous&#8221; flag <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1740-excessive-authentication-attempts-vulnerability-in-akinsoft-myrezzta\/\"  data-wpil-monitor-id=\"86787\">attempts to access the share without any authentication<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, users are urged to apply the vendor-provided patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation, helping to detect and block malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2411-excessive-authentication-attempts-vulnerability-in-akinsoft-taskpano\/\"  data-wpil-monitor-id=\"87829\">attempts to exploit this vulnerability<\/a>.<br \/>\nAdditionally, organizations should limit network exposure for all <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29514-high-severity-access-control-vulnerability-in-d-link-dsl-7740c-router\/\"  data-wpil-monitor-id=\"83193\">control system devices and ensure they are not accessible<\/a> from the internet. Regularly checking and updating firewall rules can further strengthen the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54887-significant-security-vulnerability-in-jwe-ruby-encryption-implementation\/\"  data-wpil-monitor-id=\"82706\">security posture against such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The vulnerability, identified as CVE-2025-40804, is a serious security issue affecting all versions of SIMATIC Virtualization as a Service (SIVaaS). This vulnerability poses a significant risk as it allows potential attackers unauthenticated access to a network share, thereby providing a gateway to access or alter sensitive data without proper authorization. Given its wide-ranging impact [&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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-75195","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/75195","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=75195"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/75195\/revisions"}],"predecessor-version":[{"id":80643,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/75195\/revisions\/80643"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=75195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=75195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=75195"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=75195"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=75195"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=75195"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=75195"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=75195"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=75195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}