{"id":"EM-20261112-Z3QE","url":"https://cyber.eventmonitor.net/incident/EM-20261112-Z3QE/ashlar-vellum-cobalt-xe-file-parsing-vulnerability-cve-2026-121744/","type":"cve","title":"Ashlar-Vellum Cobalt XE File Parsing Vulnerability (CVE-2026-121744)","subtitle":"CVE-2026-121744","subject":"CVE-2026-121744","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-12T03:17:10.763Z","firstSignal":"2026-11-04T06:00:00.000Z","lastSignal":"2026-11-12T03:17:10.763Z","updated":"2026-11-12T03:34:34.646Z","revision":1,"life":[{"status":"Born","at":"2026-11-12T03:17:10.763Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-11-12T03:17:10.763Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T06:00:00.000Z","what":"First signal: C37 Zero Day Initiative (published)"},{"at":"2026-11-12T03:17:10.763Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261112-Z3QE created."},{"at":"2026-11-12T03:17:10.763Z","what":"Severity raised to High by C6"}],"stages":[{"name":"Disclosed","at":"2026-11-12T03:17:10.763Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-12T03:17:10.763Z","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-26-870: (0Day) Ashlar-Vellum Cobalt XE File Parsing Stack-based Buffer Overflow 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-2026-121744.","url":"http://www.zerodayinitiative.com/advisories/ZDI-26-870/"},{"at":"2026-11-12T03:17:10.763Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-121744 (CVSS 7.8)","text":"Ashlar-Vellum Cobalt XE File Parsing Stack-based Buffer Overflow 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 proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to…","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121744"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-12T03:17:10.763","score":7.8,"severity":"HIGH","desc":"Ashlar-Vellum Cobalt XE File Parsing Stack-based Buffer Overflow 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…","product":"","seen":1794454474646},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}