{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-4714/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Firefox","Firefox ESR","Thunderbird"],"_cs_severities":["high"],"_cs_tags":["cve-2026-4714","firefox","thunderbird","denial-of-service"],"_cs_type":"advisory","_cs_vendors":["Mozilla"],"content_html":"\u003cp\u003eCVE-2026-4714 describes a vulnerability found in the Audio/Video component of Mozilla Firefox, Firefox ESR, and Thunderbird. This flaw stems from incorrect boundary conditions, which could be exploited by attackers to cause a denial-of-service. The vulnerability impacts Firefox versions prior to 149, Firefox ESR versions prior to 140.9, Thunderbird versions prior to 149, and Thunderbird versions prior to 140.9. This vulnerability was published on 2026-03-24 and assigned a CVSS v3.1 base score of 7.5, indicating a high severity. Successful exploitation could lead to service disruption for users of the affected software. Defenders should prioritize patching affected systems to mitigate this risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker crafts a malicious audio or video file or network stream.\u003c/li\u003e\n\u003cli\u003eThe attacker hosts the malicious content on a website or sends it via email.\u003c/li\u003e\n\u003cli\u003eA user opens the attacker-controlled webpage in a vulnerable version of Firefox, or opens the malicious attachment in Thunderbird.\u003c/li\u003e\n\u003cli\u003eThe browser or email client attempts to process the malicious audio or video data.\u003c/li\u003e\n\u003cli\u003eDue to incorrect boundary conditions in the Audio/Video component, a buffer overflow or similar memory corruption error occurs.\u003c/li\u003e\n\u003cli\u003eThe application crashes due to the memory corruption, resulting in a denial-of-service condition.\u003c/li\u003e\n\u003cli\u003e(Hypothetical) In a more severe exploitation scenario, the attacker could potentially achieve remote code execution, although this is not explicitly stated in the advisory.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-4714 can lead to a denial-of-service condition, causing the affected Firefox, Firefox ESR, or Thunderbird application to crash. While the vulnerability has a high CVSS score, the primary impact is service disruption. A widespread, successful attack against organizations relying on these applications could impact productivity and user experience. The NVD lists this vulnerability as affecting Firefox \u0026lt; 149, Firefox ESR \u0026lt; 140.9, Thunderbird \u0026lt; 149, and Thunderbird \u0026lt; 140.9.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately update Firefox to version 149 or later to patch CVE-2026-4714.\u003c/li\u003e\n\u003cli\u003eImmediately update Firefox ESR to version 140.9 or later to patch CVE-2026-4714.\u003c/li\u003e\n\u003cli\u003eImmediately update Thunderbird to version 149 or later to patch CVE-2026-4714.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026quot;Detect Firefox/Thunderbird Crashes\u0026quot; to identify potential exploitation attempts in your environment, monitoring the \u003ccode\u003eprocess_creation\u003c/code\u003e log source for crashes.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-30T12:00:00Z","date_published":"2024-01-30T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-30-firefox-av-vuln/","summary":"CVE-2026-4714 is a high-severity vulnerability affecting Firefox, Firefox ESR, and Thunderbird due to incorrect boundary conditions in the Audio/Video component, potentially leading to denial-of-service.","title":"Mozilla Firefox Audio/Video Boundary Condition Vulnerability (CVE-2026-4714)","url":"https://feed.craftedsignal.io/briefs/2024-01-30-firefox-av-vuln/"}],"language":"en","title":"CraftedSignal Threat Feed - Cve-2026-4714","version":"https://jsonfeed.org/version/1.1"}