{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/products/mutt/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":true,"_cs_products":["mutt"],"_cs_severities":["medium"],"_cs_tags":["denial-of-service","email"],"_cs_type":"threat","_cs_vendors":[],"content_html":"\u003cp\u003eMultiple vulnerabilities in the mutt email client allow a remote, anonymous attacker to bypass security measures and potentially cause a denial-of-service (DoS) condition. While specific details regarding the vulnerabilities are not provided in the source, the advisory indicates a risk of exploitation that could disrupt email services for users of the mutt client. The lack of CVEs or specific techniques suggests a potential zero-day or newly discovered flaw. This poses a risk to organizations relying on mutt for email communications, especially if security measures are not up-to-date or properly configured. The scope of targeting is broad, affecting any user of the mutt email client.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable instance of the mutt email client.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious email or other input designed to trigger a vulnerability in mutt.\u003c/li\u003e\n\u003cli\u003eThe malicious input is sent to a user of the mutt email client.\u003c/li\u003e\n\u003cli\u003eThe user opens the email or processes the malicious input, causing the mutt client to parse the data.\u003c/li\u003e\n\u003cli\u003eThe vulnerability is triggered, potentially leading to memory corruption, code execution, or resource exhaustion.\u003c/li\u003e\n\u003cli\u003eIf the vulnerability leads to resource exhaustion, the mutt client becomes unresponsive, denying service to the user.\u003c/li\u003e\n\u003cli\u003eRepeated exploitation of the vulnerability can lead to a sustained denial-of-service condition.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these vulnerabilities could lead to a denial-of-service condition for users of the mutt email client. This can disrupt email communications and potentially lead to loss of productivity. The advisory does not specify the number of victims or sectors targeted, but the impact could be widespread given the popularity of the mutt client among certain user groups. The lack of specific CVEs makes it difficult to assess the severity of the impact, but the potential for DoS warrants immediate attention.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor network traffic for patterns indicative of denial-of-service attacks targeting systems running the mutt email client.\u003c/li\u003e\n\u003cli\u003eImplement rate limiting and traffic filtering to mitigate the impact of potential DoS attacks.\u003c/li\u003e\n\u003cli\u003eSince the source does not include specific IOCs, focus on generic DoS detection strategies tailored to email protocols.\u003c/li\u003e\n\u003cli\u003eInvestigate and apply any available patches or updates for mutt from the vendor to address the underlying vulnerabilities once they are published.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-04T10:49:07Z","date_published":"2026-05-04T10:49:07Z","id":"/briefs/2026-05-mutt-dos/","summary":"A remote, anonymous attacker can exploit multiple vulnerabilities in mutt to bypass security measures and cause a denial-of-service condition.","title":"Multiple Vulnerabilities in Mutt Email Client Lead to Potential DoS","url":"https://feed.craftedsignal.io/briefs/2026-05-mutt-dos/"}],"language":"en","title":"CraftedSignal Threat Feed — Mutt","version":"https://jsonfeed.org/version/1.1"}