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VulnerabilityPublished

CVE-2025-8004: Ashlar-Vellum Cobalt · Out-of-bounds Read

Affects Ashlar-Vellum CobaltSource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High.

Data as of 26 Oct 2026, 12:29 UTC

CVSS 3.0 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

Organizations should immediately implement strict controls around the handling and opening of XE files, including disabling automatic opening of files from untrusted sources and educating users about the risks of opening files from unknown or suspicious origins. Network-level protections such as email filtering and web content filtering should be enhanced to block delivery of malicious XE files or links to malicious pages. Until a vendor patch is released, consider isolating systems running Ashlar-Vellum Cobalt from untrusted networks and restricting internet access where feasible. Employ endpoint detection and response (EDR) tools to monitor for unusual process behavior indicative of exploitation attempts. Regular backups of critical design data should be maintained to enable recovery in case of compromise. Organizations should also monitor vendor communications closely for patch releases and apply updates promptly once available. Additionally, implementing application whitelisting and sandboxing for file opening processes can reduce exploitation risk.

Description

Ashlar-Vellum Cobalt XE File Parsing Out-Of-Bounds Read 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 XE files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26236.

References

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