{"id":229099,"date":"2026-03-28T05:11:00","date_gmt":"2026-03-28T09:11:00","guid":{"rendered":"https:\/\/news-you-need.com\/index.php\/2026\/03\/28\/citrix-netscaler-under-active-recon-for-cve-2026-3055-cvss-9-3-memory-overread-bug\/"},"modified":"2026-03-30T05:20:12","modified_gmt":"2026-03-30T09:20:12","slug":"citrix-netscaler-under-active-recon-for-cve-2026-3055-cvss-9-3-memory-overread-bug","status":"publish","type":"post","link":"https:\/\/news-you-need.com\/index.php\/2026\/03\/28\/citrix-netscaler-under-active-recon-for-cve-2026-3055-cvss-9-3-memory-overread-bug\/","title":{"rendered":"Citrix NetScaler Under Active Recon for CVE-2026-3055 (CVSS 9.3) Memory Overread Bug"},"content":{"rendered":"<p><a href=\"https:\/\/thehackernews.com\/2026\/03\/citrix-netscaler-under-active-recon-for.html\">Citrix NetScaler Under Active Recon for CVE-2026-3055 (CVSS 9.3) Memory Overread Bug<\/a><\/p>\n<p><a href=\"https:\/\/thehackernews.com\/2026\/03\/citrix-netscaler-under-active-recon-for.html\">https:\/\/thehackernews.com\/2026\/03\/citrix-netscaler-under-active-recon-for.html<\/a><\/p>\n<p>Publish Date: <a href=\"publish_date]\">2026-03-28 05:11:00<\/a><\/p>\n<p>Source Domain: <a href=\"thehackernews.com\">thehackernews.com<\/a><\/p>\n<p><span class=\"p-author\">\ue804<span class=\"author\">Ravie Lakshmanan<\/span>\ue802<span class=\"author\">Mar 28, 2026<\/span><\/span><span class=\"p-tags\">Vulnerability \/ Network Security<\/span><\/p>\n<p>A recently disclosed critical security flaw impacting Citrix NetScaler ADC and NetScaler Gateway is witnessing active reconnaissance activity, according to Defused Cyber and watchTowr.<\/p>\n<p>The vulnerability, <strong>CVE-2026-3055<\/strong> (CVSS score: 9.3), refers to a case of insufficient input validation leading to memory overread, which an attacker could exploit to leak potentially sensitive information.<\/p>\n<p>Per Citrix, successful exploitation of the flaw hinges on the appliance being configured as a SAML Identity Provider (SAML IDP).<\/p>\n<p>&#8220;We are now observing auth method fingerprinting activity against NetScaler ADC\/Gateway in the wild,&#8221; Defused Cyber said in a post on X. &#8220;Attackers are probing \/cgi\/GetAuthMethods to enumerate enabled authentication flows in our Citrix honeypots.&#8221;<\/p>\n<p>This is likely an attempt on the part of threat actors to determine if NetScaler ADC and NetScaler Gateway are indeed configured as a SAML IDP.<\/p>\n<p>In a similar warning, watchTowr said it has detected active reconnaissance against NetScaler instances in its honeypot network, raising the possibility that in-the-wild exploitation can happen anytime.<\/p>\n<p>&#8220;Organizations running affected Citrix NetScaler versions in affected configurations need to drop tools and patch immediately,&#8221; the company said. &#8220;When attacker reconnaissance shifts to active exploitation, the window to respond will evaporate.&#8221;<\/p>\n<p>The vulnerability affects NetScaler ADC and NetScaler Gateway versions 14.1 before 14.1-66.59 and 13.1 before 13.1-62.23, as well as NetScaler ADC 13.1-FIPS and 13.1-NDcPP before 13.1-37.262.<\/p>\n<p>In recent years, a number of security vulnerabilities affecting NetScaler have come under active exploitation in the wild. These include CVE-2023-4966 (Citrix Bleed), CVE-2025-5777 (Citrix Bleed 2), CVE-2025-6543, and CVE-2025-7775.<\/p>\n<p>It&#8217;s therefore crucial that users move quickly to the latest updates as soon as possible to stay protected, as it&#8217;s a matter of not if, but&#8230;<\/p>\n<p><a href=\"https:\/\/thehackernews.com\/2026\/03\/citrix-netscaler-under-active-recon-for.html\">Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Citrix NetScaler Under Active Recon for CVE-2026-3055 (CVSS 9.3) Memory Overread Bug https:\/\/thehackernews.com\/2026\/03\/citrix-netscaler-under-active-recon-for.html Publish Date:&#8230;<\/p>\n","protected":false},"author":1,"featured_media":229100,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/blogger.googleusercontent.com\/img\/b\/R29vZ2xl\/AVvXsEgwI3gfUe4wDxvIuUsVXUVcyiZ6TWg7HIh7UgKbWXN8e5p6VbJM5hHvR0gCKbVRD3tx311R5b9TWnt0OrLNfpoSBrP1tv06PBWrUXtwzAZAvHVHo8a1uZXzqZBDkpCeGgHWI9tRrk39_n_YZgO7CeX6MXHo4kFSu_lFd5ZmAuiTdrg-x8w0svB3lF-2U1LV\/s1600\/citrix-exploit.jpg","fifu_image_alt":"","footnotes":""},"categories":[15],"tags":[31,29,27],"class_list":["post-229099","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-exploit","tag-network-security","tag-vulnerability"],"_links":{"self":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/229099"}],"collection":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/comments?post=229099"}],"version-history":[{"count":1,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/229099\/revisions"}],"predecessor-version":[{"id":229101,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/229099\/revisions\/229101"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media\/229100"}],"wp:attachment":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media?parent=229099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/categories?post=229099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/tags?post=229099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}