{"id":79388,"date":"2025-10-01T01:06:33","date_gmt":"2025-10-01T01:06:33","guid":{"rendered":""},"modified":"2025-10-21T23:20:54","modified_gmt":"2025-10-22T05:20:54","slug":"cve-2025-20315-denial-of-service-vulnerability-in-cisco-ios-xe-s-nbar-feature","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-20315-denial-of-service-vulnerability-in-cisco-ios-xe-s-nbar-feature\/","title":{"rendered":"<strong>CVE-2025-20315: Denial of Service Vulnerability in Cisco IOS XE&#8217;s NBAR Feature<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-20315 is a severe vulnerability found in the Network-Based Application Recognition (NBAR) feature of Cisco IOS XE Software. This flaw allows an unauthenticated, remote attacker to cause an affected device to reload, creating a denial of service (DoS) condition. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36901-critical-wlan-vulnerability-in-android-affecting-google-pixel-devices\/\"  data-wpil-monitor-id=\"87429\">vulnerability has significant importance as it affects<\/a> a wide range of devices running on Cisco IOS XE Software, potentially causing extensive downtime and disruption. The ease of exploit and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26210-deepseek-xss-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"86678\">potential system<\/a> compromise or data leakage necessitates prompt attention and mitigation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-20315<br \/>\nSeverity: High (8.6 CVSS Score)<br \/>\nAttack Vector: Network-based<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Unexpected device reloading, potential system compromise or data leakage, and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30256-denial-of-service-vulnerability-in-tenda-ac6-s-http-header-parsing-functionality\/\"  data-wpil-monitor-id=\"86844\">denial of service<\/a>.<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1987069164\" 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>Cisco IOS XE Software | All versions prior to the latest patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41682-critical-credential-exposure-vulnerability-in-charge-controller-systems\/\"  data-wpil-monitor-id=\"88630\">vulnerability arises from improper handling of malformed Control<\/a> and Provisioning of Wireless Access Points (CAPWAP) packets. A <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53248-php-remote-file-inclusion-vulnerability-in-unfoldwp-magazine\/\"  data-wpil-monitor-id=\"86837\">remote attacker can exploit this vulnerability<\/a> by sending malformed CAPWAP packets through a device running on vulnerable Cisco IOS XE Software. Successful exploitation could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-57578-critical-vulnerability-in-h3c-magic-m-device-allows-remote-code-execution\/\"  data-wpil-monitor-id=\"90945\">allow the attacker to cause the device<\/a> to reload unexpectedly, leading to a denial of service condition.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2575377330\" 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 conceptual example demonstrates the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47129-out-of-bounds-write-vulnerability-in-adobe-framemaker-with-potential-for-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"86892\">potential exploit of this vulnerability<\/a>. An attacker could send a malformed CAPWAP packet like this:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/CAPWAP\/packet HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/capwap\n{ &quot;malformed_packet&quot;: &quot;malicious_payload&quot; }<\/code><\/pre>\n<p>This malformed CAPWAP packet could cause the device to reload, creating a denial of service condition.<\/p>\n<p><strong>Mitigation Actions<\/strong><\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9114-critical-arbitrary-user-password-change-vulnerability-in-doccure-wordpress-theme\/\"  data-wpil-monitor-id=\"88284\">Vulnerable users<\/a> are advised to apply the vendor patch from Cisco immediately. As a temporary mitigation, users can also use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and prevent the exploitation of this vulnerability. However, these temporary measures do not replace the need for patching the system, which offers a more permanent <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30519-default-root-credentials-vulnerability-in-dover-fueling-solutions-progauge-maglink-lx4-devices\/\"  data-wpil-monitor-id=\"90209\">solution to the vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-20315 is a severe vulnerability found in the Network-Based Application Recognition (NBAR) feature of Cisco IOS XE Software. This flaw allows an unauthenticated, remote attacker to cause an affected device to reload, creating a denial of service (DoS) condition. This vulnerability has significant importance as it affects a wide range of devices running on [&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":[77,96],"product":[97],"attack_vector":[87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-79388","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apple","vendor-cisco","product-cisco-ios-xe","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79388","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=79388"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79388\/revisions"}],"predecessor-version":[{"id":83903,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79388\/revisions\/83903"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=79388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=79388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=79388"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=79388"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=79388"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=79388"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=79388"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=79388"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=79388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}