{"id":2554,"date":"2026-11-06T11:15:19","date_gmt":"2026-11-06T05:45:19","guid":{"rendered":"https:\/\/www.hexnode.com\/threat-watch\/?p=2554"},"modified":"2026-11-10T11:59:19","modified_gmt":"2026-11-10T06:29:19","slug":"cve-2024-27834-cisa-kev-apple-mobile-exploit","status":"publish","type":"post","link":"https:\/\/www.hexnode.com\/threat-watch\/cve-2024-27834-cisa-kev-apple-mobile-exploit\/","title":{"rendered":"CVE-2024-27834 Added to CISA KEV: Mobile Device Patch Levels Matter Again"},"content":{"rendered":"<p>CISA added CVE-2024-27834 to its Known Exploited Vulnerabilities (KEV) catalog on November 4, 2026, following evidence of active exploitation. Apple patched the Pointer Authentication bypass in May 2024, but researchers subsequently identified its use in a mobile watering-hole campaign.<\/p>\n<p>The campaign combined compromised websites, imitation sites, and a compromised analytics script to deliver exploits to visiting devices. Researchers assessed a connection to Russia\u2019s Midnight Blizzard. For enterprise teams, the concern is whether deployed devices have received the relevant updates, including fixes available long before the latest warning.<\/p>\n<h2>From Apple\u2019s patch to CISA\u2019s exploitation warning<\/h2>\n<p>The timeline separates the original fix from the subsequent remediation requirement:<\/p>\n<ul>\n<li><strong>May 2024:<\/strong> Apple released fixes across iOS, iPadOS, macOS, Safari, tvOS, and watchOS.<\/li>\n<li><strong>November 4, 2026:<\/strong> CISA added the vulnerability to <a href=\"https:\/\/www.hexnode.com\/blogs\/explained\/what-are-known-exploited-vulnerabilities-kev\/\">KEV<\/a> based on evidence of active exploitation.<\/li>\n<li><strong>November 18, 2026:<\/strong> The KEV entry\u2019s federal remediation deadline.<\/li>\n<\/ul>\n<p>CISA\u2019s announcement confirms exploitation of the vulnerability. The campaign details and suspected Midnight Blizzard connection come from researchers\u2019 reporting.<\/p>\n<div class=\"next_blog\"><div class=\"post-next\"><div class=\"hex_blog_box_parent\"><div class=\"blog_warp_next\"><div class=\"next_blog_thumb\" style=\"background-image:url(https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/cybersecurity-essentials.jpeg?format=webp)\"><\/div><div class=\"next_post_content\"><div class=\"center_box\"><h4>Cybersecurity essentials for any organization<\/h4><p>Explore cybersecurity essentials for protecting organizational data, devices, and networks.<\/p><\/div><\/div><\/div><a class=\"hex_blog_box_link hn-cta__blogs--blog-box\" href=\"https:\/\/www.hexnode.com\/blogs\/cybersecurity-essentials-for-any-organization\/\" aria-label=\"Cybersecurity essentials for any organization\"><\/a><\/div><\/div><\/div>\n<h2>How the campaign reached mobile users<\/h2>\n<p>The campaign targeted mobile users in the United States and Europe through three delivery routes:<\/p>\n<table style=\"width: 100%;\">\n<thead>\n<tr style=\"background-color: #e4e8eb;\">\n<th style=\"width: 20.9302%; text-align: center;\" scope=\"col\"><strong>Delivery route<\/strong><\/th>\n<th style=\"width: 38.9006%; text-align: center;\" scope=\"col\"><strong>Reported activity<\/strong><\/th>\n<th style=\"width: 39.1121%; text-align: center;\" scope=\"col\"><strong>Enterprise significance<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"width: 20.9302%;\">Compromised websites<\/td>\n<td style=\"width: 38.9006%;\">Malicious JavaScript inserted into legitimate sites<\/td>\n<td style=\"width: 39.1121%;\">Ordinary browsing could expose unpatched devices.<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.9302%;\">Impersonation sites<\/td>\n<td style=\"width: 38.9006%;\">Fake sites copied trusted destinations<\/td>\n<td style=\"width: 39.1121%;\">Familiar branding did not establish safety.<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 20.9302%;\">Plerdy SEO Tracker<\/td>\n<td style=\"width: 38.9006%;\">Analytics script compromised for one week<\/td>\n<td style=\"width: 39.1121%;\">Third-party code expanded exposure across sites using the component.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The Plerdy script was loaded by thousands of predominantly Ukrainian websites. That distribution should not be interpreted as a count of successfully compromised devices. Delivery code profiled visitors before serving platform-specific <a href=\"https:\/\/www.hexnode.com\/blogs\/explained\/what-is-exploit-chain\/\">exploit chains<\/a>.<\/p>\n<h2>How CVE-2024-27834 supported cookie theft<\/h2>\n<p>Pointer Authentication provides hardware-backed checks on certain pointers. Apple states that this vulnerability requires an attacker who already has arbitrary memory read and write capability.<\/p>\n<p>The reported iOS chain combined separate stages:<\/p>\n<ul>\n<li><strong>Initial capability:<\/strong> A WebKit remote-code-execution flaw provided the initial exploitation capability.<\/li>\n<li><strong>Protection bypass:<\/strong> <a href=\"https:\/\/access.redhat.com\/security\/cve\/cve-2024-27834?utm_source=hexnode_blog&amp;utm_medium=referral&amp;utm_campaign=cve_2024_27834_cisa_kev_apple\" target=\"_blank\" rel=\"nofollow noopener\">CVE-2024-27834<\/a> bypassed Pointer Authentication, helping the attacker proceed with code execution.<\/li>\n<li><strong>Collection:<\/strong> The chain executed a JavaScript payload designed to steal cookies.<\/li>\n<\/ul>\n<p>The reported zero-click behavior required no further interaction after malicious web content loaded. Website exposure was still part of the delivery process.<\/p>\n<p>A separate Android chain exploited <a href=\"https:\/\/www.hexnode.com\/blogs\/explained\/what-is-vulnerability-in-cybersecurity\/\">vulnerabilities<\/a> in Chrome and Qualcomm chipsets. Those flaws were already patched before the campaign; they are distinct from the Apple vulnerability.<\/p>\n<h2>What enterprise teams should verify<\/h2>\n<p>The response should cover the software involved in each platform\u2019s exposure:<\/p>\n<ul>\n<li><strong>Inventory versions:<\/strong> Review installed OS and browser versions across managed Apple and Android devices.<\/li>\n<li><strong>Match applicable fixes:<\/strong> Verify devices against Apple&#8217;s May 2024 security releases, including iOS\/iPadOS 17.5 or 16.7.8 for supported devices, macOS Sonoma 14.5, Safari 17.5, watchOS 10.5, and tvOS 17.5. Check the latest vendor guidance for subsequent security updates and the separate Chrome and Qualcomm vulnerabilities involved in the campaign.<\/li>\n<li><strong>Verify completion:<\/strong> Confirm installed versions after deployment and identify devices that remain below requirements.<\/li>\n<\/ul>\n<p>The May 2024 Apple fixes address this particular flaw. They are not a complete baseline for every exploit used in the wider campaign.<\/p>\n<h2>How Hexnode supports managed-device remediation<\/h2>\n<p><a href=\"https:\/\/www.hexnode.com\/uem\/\">Hexnode UEM<\/a> helps administrators identify devices below configured OS requirements, manage supported updates, and review compliance across enrolled devices.<\/p>\n<h3>Identify outdated devices<\/h3>\n<p>Configure OS version criteria under <strong>Policies<\/strong> &gt; <strong>Compliance Policies<\/strong> &gt; <strong>Advanced Settings<\/strong> to flag devices running below your required version.<\/p>\n<h3>Apply supported updates<\/h3>\n<p>Use the <strong>Update OS<\/strong> action on eligible Apple devices. For Android Enterprise devices enrolled as <strong>Device Owner<\/strong>, configure OS update policies to install available updates automatically or during inactive hours.<\/p>\n<h3>Restrict access to malicious websites<\/h3>\n<p>Use Hexnode&#8217;s <a href=\"https:\/\/www.hexnode.com\/blogs\/explained\/what-is-web-content-filtering\/\">Web Content Filtering<\/a> policies on supported iOS, macOS, and Samsung Knox devices to block known malicious URLs while patches are being deployed. Apply platform-specific policies to eligible devices to reduce exposure to identified malicious websites. This provides an additional layer of protection but does not replace patching.<\/p>\n<h3>Check enrollment prerequisites<\/h3>\n<p>The iOS\/iPadOS Update OS action requires supervision, while Android OS update scheduling requires Device Owner enrollment. For <a href=\"https:\/\/www.hexnode.com\/mobile-device-management\/bring-your-own-device\/\">BYOD<\/a> devices enrolled through Android Profile Owner or iOS User Enrollment, use supported compliance checks and enable user notifications for non-compliant devices to guide manual remediation. Where configured, conditional access can restrict organizational resource access based on device compliance status.<\/p>\n<h3>Review compliance afterward<\/h3>\n<p>Navigate to <strong>Reports<\/strong> &gt; <strong>Built-in Reports<\/strong> &gt; <strong>Compliance<\/strong> &gt; <strong>Non-compliant Devices<\/strong> to identify devices failing configured compliance requirements across the fleet. Filter by device type or ownership and export the report for further review. Verify reported OS versions separately to confirm patch completion.<\/p>\n<p>These workflows support patch verification on managed devices. Compliance status alone does not establish whether a device encountered the campaign\u2019s malicious JavaScript or was previously compromised.<\/p>\n<section id='resource-single'>\n                    <div class='resource-box'>\n                        <div class='resource-box__image-section'>\n                            <div class='resource-box__image-wrap'>\n                                <img decoding=\"async\" src=\"https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/The-cybersecurity-blueprint.png?format=webp\" class=\"resource-box__image\" alt=\"the cybersecurity blueprint\" loading=\"lazy\" srcset=\"https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/The-cybersecurity-blueprint.png?format=webp 960w, https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/The-cybersecurity-blueprint-300x225.png?format=webp 300w, https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/The-cybersecurity-blueprint-768x576.png?format=webp 768w, https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/The-cybersecurity-blueprint-133x100.png?format=webp 133w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" title=\"the cybersecurity blueprint\" \/>\n                            <\/div>\n                        <\/div>\n                        <div class='resource-box__content-section'>\n                            <h5 class='resource-box__content-subheading'>\n                            Featured resource\n                            <\/h5>\n                            <h4 class='resource-box__content-heading'>\n                            The Cybersecurity Blueprint\n                            <\/h4>\n                            <p class='resource-box__contents'>\n                            Learn how to choose and implement a cybersecurity strategy aligned with your organization\u2019s security needs.\n                            <\/p>\n                            <a class='resource-box__content-link hn-cta__blogs--resource-box' href='https:\/\/www.hexnode.com\/resources\/white-papers\/the-cybersecurity-blueprint-how-to-adopt-the-right-cybersecurity-strategy-for-your-business\/'>\n                            DOWNLOAD\n                            <svg xmlns='http:\/\/www.w3.org\/2000\/svg' width='20' height='20' viewBox='0 0 20 20'>\n                            <g id='arrow' transform='translate(-309 -191)' opacity='0'>\n                                <rect id='base' width='20' height='20' transform='translate(309 191)' fill='none'\/>\n                                <path id='arrow-2' data-name='arrow' d='M13.093.5,6.8,6.8.5.5' transform='translate(315 207.594) rotate(-90)' fill='none' stroke='#0549d1' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.2'\/>\n                            <\/g>\n                            <\/svg>\n\n                            <\/a>\n                        <\/div>\n                    <\/div>\n                <\/section>\n<div class=\"faq-section-wrapper\" itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"><h2 class=\"faq-main-title\">Frequently Asked Questions<\/h2><div class=\"faq-items\"><div class=\"faq-item\" itemprop=\"mainEntity\" itemscope itemtype=\"https:\/\/schema.org\/Question\"><div class=\"faq-item__question\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\"><span itemprop=\"name\">Does the KEV listing confirm Midnight Blizzard attribution?<\/span>\n            <div class=\"toggle\" aria-hidden=\"true\"><span><\/span><span><\/span><\/div>\n        <\/div> <div class=\"faq-item__content\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"faq-item__body\" itemprop=\"text\"><p>No. CISA confirms evidence of exploitation. The suspected connection to Midnight Blizzard comes from the researchers\u2019 assessment.<\/p>\n<\/div><\/div><\/div>\n<div class=\"faq-item\" itemprop=\"mainEntity\" itemscope itemtype=\"https:\/\/schema.org\/Question\"><div class=\"faq-item__question\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\"><span itemprop=\"name\">Does CVE-2024-27834 affect Android?<\/span>\n            <div class=\"toggle\" aria-hidden=\"true\"><span><\/span><span><\/span><\/div>\n        <\/div> <div class=\"faq-item__content\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"faq-item__body\" itemprop=\"text\"><p>This CVE concerns Apple products. The campaign\u2019s Android exploit chain used separate Chrome and Qualcomm vulnerabilities.<\/p>\n<\/div><\/div><\/div>\n<div class=\"faq-item\" itemprop=\"mainEntity\" itemscope itemtype=\"https:\/\/schema.org\/Question\"><div class=\"faq-item__question\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\"><span itemprop=\"name\">Can the same update controls cover every BYOD device?<\/span>\n            <div class=\"toggle\" aria-hidden=\"true\"><span><\/span><span><\/span><\/div>\n        <\/div> <div class=\"faq-item__content\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\"><div class=\"faq-item__body\" itemprop=\"text\"><p>Update capabilities depend on platform and enrollment type. Verify supported controls before relying on enforced updates for personally owned devices.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n<h3>Keep patch verification continuous<\/h3>\n<p>The CVE-2024-27834 CISA KEV listing shows why older fixes remain operationally relevant. Maintain current platform-specific baselines, prioritize devices below them, and verify remediation. A patch only reduces a device\u2019s exposure once you install the applicable update.<\/p>\n<div class=\"signup_box\"><div class=\"signup_wrap_img\"><div class=\"signup-bg\" style=\"background-image:url(https:\/\/cdn.hexnode.com\/threat-watch\/wp-content\/uploads\/2026\/08\/Hexnode-MDM-free-trial.jpg?format=webp)\"><\/div><\/div><div class=\"signup_wrap\"><h5>Keep device updates in focus with Hexnode.<\/h5><p>Review device versions, manage supported updates, and track compliance.<\/p><a href=\"https:\/\/www.hexnode.com\/mobile-device-management\/cloud\/signup\/\" class=\"hn-cta__blogs--signup-stripe\" target=\"_blank\"> SIGN UP NOW<\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>CISA added CVE-2024-27834 to its Known Exploited Vulnerabilities (KEV) catalog on November 4, 2026, following&#8230;<\/p>\n","protected":false},"author":5,"featured_media":2567,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18,21],"class_list":["post-2554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobile","category-patch-management","product_category-unified-endpoint-management","tab_group-vulnerabilities"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>CVE-2024-27834 CISA KEV Apple: Mobile Patch Checks<\/title>\n<meta name=\"description\" content=\"CVE-2024-27834 CISA KEV Apple alert: Review the exploit chain, mobile risks, and patch compliance steps for managed enterprise devices.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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