CVE-2025-8001: Ashlar-Vellum Cobalt · Memory Buffer Overflow
Affects Ashlar-Vellum CobaltSource CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
European organizations should implement targeted mitigations beyond generic advice: 1) Restrict and monitor the exchange of CO files, especially from untrusted or external sources, using file integrity monitoring and content inspection tools. 2) Educate users about the risks of opening CO files from unknown or suspicious origins and enforce strict policies on file handling. 3) Employ application whitelisting and sandboxing techniques to limit the privileges and impact of potential exploitation within the Cobalt application. 4) Use endpoint detection and response (EDR) solutions to monitor for anomalous behavior indicative of exploitation attempts. 5) Network segmentation should be applied to isolate systems running Ashlar-Vellum Cobalt from critical infrastructure. 6) Maintain up-to-date backups of design files to enable recovery in case of compromise. 7) Monitor vendor communications closely for patches or updates addressing this vulnerability and plan for rapid deployment once available. 8) Consider disabling or restricting the parsing of CO files in contexts where it is not essential.
Description
Ashlar-Vellum Cobalt CO File Parsing Memory Corruption 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. The specific flaw exists within the parsing of CO files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26053.