{"id":80566,"date":"2026-06-15T09:46:24","date_gmt":"2026-06-15T06:16:24","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-12221-yealink-sip-t46u-firmware-chunk-upload-upgrade-sprintf-stack-based-overflow\/"},"modified":"2026-06-15T09:46:24","modified_gmt":"2026-06-15T06:16:24","slug":"cve-2026-12221-yealink-sip-t46u-firmware-chunk-upload-upgrade-sprintf-stack-based-overflow","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-12221-yealink-sip-t46u-firmware-chunk-upload-upgrade-sprintf-stack-based-overflow\/","title":{"rendered":"CVE-2026-12221 &#8211; Yealink SIP-T46U Firmware Chunk Upload upgrade sprintf stack-based overflow"},"content":{"rendered":"<p>CVE ID :CVE-2026-12221<\/p>\n<p>  Published : June 15, 2026, 6:16 a.m. | 1\u00a0hour, 41\u00a0minutes ago<\/p>\n<p>  Description :A vulnerability was found in Yealink SIP-T46U 108.86.0.118. This impacts the function sprintf of the file \/api\/upgrade\/upgrade of the component Firmware Chunk Upload Handler. Performing a manipulation of the argument uid\/start_offset results in stack-based buffer overflow. The attack needs to be approached within the local network. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.<\/p>\n<p>  Severity: 8.0 | HIGH<\/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-2026-12221 Published : June 15, 2026, 6:16 a.m. | 1\u00a0hour, 41\u00a0minutes ago Description :A vulnerability was found in Yealink SIP-T46U 108.86.0.118. This impacts the function sprintf of the file \/api\/upgrade\/upgrade of the component Firmware Chunk Upload Handler. Performing a manipulation of the argument uid\/start_offset results in stack-based buffer overflow. The attack needs to &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-80566","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/80566","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=80566"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/80566\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=80566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=80566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=80566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}