{"id":"CVE-2025-11464","title":"Ashlar-Vellum Cobalt CO File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability","summary":"Ashlar-Vellum Cobalt CO File Parsing Heap-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…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"ashlar","product":"cobalt","affected":["cobalt = 12.2.1204.97"],"published":"2025-10-29","updated":"2026-10-08","sourceUpdated":"2026-10-08T11:10:00.250","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-11464","references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-25-955/","label":"zdi-disclosures@trendmicro.com"}],"tags":["nvd"],"epss":0.00205,"epssPercentile":0.09581,"zeroDay":true,"ingestedAt":"2026-10-08T11:31:27.682Z","slug":"CVE-2025-11464","body":"## Overview\n\nAshlar-Vellum Cobalt CO File Parsing Heap-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 CO files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26628.\n\n## Affected\n\n- `cobalt = 12.2.1204.97`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":68,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":25,"ransomware":0},"changes":[]}