{"id":76775,"date":"2026-02-10T01:04:05","date_gmt":"2026-02-09T21:34:05","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-25961-sumatrapdf-update-mitm-arbitrary-code-execution\/"},"modified":"2026-02-10T01:04:05","modified_gmt":"2026-02-09T21:34:05","slug":"cve-2026-25961-sumatrapdf-update-mitm-arbitrary-code-execution","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-25961-sumatrapdf-update-mitm-arbitrary-code-execution\/","title":{"rendered":"CVE-2026-25961 &#8211; SumatraPDF Update MITM -&gt; Arbitrary Code Execution"},"content":{"rendered":"<p>CVE ID : CVE-2026-25961<\/p>\n<p>Published :  Feb. 9, 2026, 9:34 p.m. | 47\u00a0minutes ago<\/p>\n<p>Description : SumatraPDF is a multi-format reader for Windows. In 3.5.0 through 3.5.2, SumatraPDF&#8217;s update mechanism disables TLS hostname verification (INTERNET_FLAG_IGNORE_CERT_CN_INVALID) and executes installers without signature checks. A network attacker with any valid TLS certificate (e.g., Let&#8217;s Encrypt) can intercept the update check request, inject a malicious installer URL, and achieve arbitrary code execution.<\/p>\n<p>Severity: 0.0 | NA<\/p>\n<p>Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2026-25961 Published : Feb. 9, 2026, 9:34 p.m. | 47\u00a0minutes ago Description : SumatraPDF is a multi-format reader for Windows. In 3.5.0 through 3.5.2, SumatraPDF&#8217;s update mechanism disables TLS hostname verification (INTERNET_FLAG_IGNORE_CERT_CN_INVALID) and executes installers without signature checks. A network attacker with any valid TLS certificate (e.g., Let&#8217;s Encrypt) can intercept the &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-76775","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/76775","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=76775"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/76775\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=76775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=76775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=76775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}