{"affected":[{"defaultStatus":"unknown","product":"Cobalt","source":"CNA: zdi","vendor":"Ashlar-Vellum","versions":[{"status":"affected","version":"1204.204"}]}],"cveId":"CVE-2026-121744","cwes":["CWE-121"],"description":"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 execute code in the context of the current process. Was ZDI-CAN-28172.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":7.8,"severity":"high","source":"CNA: zdi","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.0"}],"modifiedAt":1794451881092,"publishedAt":1794451881092,"references":[{"source":"CNA: zdi","tags":["x_research-advisory"],"url":"https://www.zerodayinitiative.com/advisories/ZDI-26-870/"}],"remediation":[],"revision":"3b95c6deb18dc49983df35fbefcb7af9ce3410f2c249bb8172b6fad0e83ec6a4","sources":[{"modifiedAt":1794451881092,"name":"CNA: zdi","retrievedAt":1794452943707,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121744"}],"ssvc":null,"status":"published","title":"Ashlar-Vellum Cobalt XE File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability","updatedAt":1794452943707}