{"id":"EM-20261112-1IBN","url":"https://cyber.eventmonitor.net/incident/EM-20261112-1IBN/ashlar-vellum-cobalt-xe-file-parsing-use-after-free-cve-2026-121742/","type":"cve","title":"Ashlar-Vellum Cobalt XE File Parsing Use-After-Free Vulnerability (CVE-2026-121742)","subtitle":"CVE-2026-121742","subject":"CVE-2026-121742","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-12T03:17:10.447Z","firstSignal":"2026-11-04T06:00:00.000Z","lastSignal":"2026-11-12T03:17:10.447Z","updated":"2026-11-12T03:34:34.646Z","revision":1,"life":[{"status":"Born","at":"2026-11-12T03:17:10.447Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-12T03:17:10.447Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T06:00:00.000Z","what":"First signal: C37 Zero Day Initiative (published)"},{"at":"2026-11-12T03:17:10.447Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261112-1IBN created."},{"at":"2026-11-12T03:17:10.447Z","what":"Severity raised to High by C6"}],"stages":[{"name":"Disclosed","at":"2026-11-12T03:17:10.447Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-12T03:17:10.447Z","detail":"CVSS 7.8"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T06:00:00.000Z","source":"C37","sourceName":"Zero Day Initiative (published)","role":"Research & News","severity":2,"title":"ZDI-26-874: (0Day) Ashlar-Vellum Cobalt XE File Parsing Use-After-Free Remote Code Execution Vulnerability","text":"This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-121742.","url":"http://www.zerodayinitiative.com/advisories/ZDI-26-874/"},{"at":"2026-11-12T03:17:10.447Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121742 (CVSS 7.8)","text":"Ashlar-Vellum Cobalt XE File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of XE files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of…","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121742"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-12T03:17:10.447","score":7.8,"severity":"HIGH","desc":"Ashlar-Vellum Cobalt XE File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit…","product":"","seen":1794454474646},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}