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VulnerabilityPublished

CVE-2025-7997: 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

  1. Immediate identification of all Ashlar-Vellum Cobalt 12 SP1 installations within the organization through asset inventory and software audits.
  2. Restrict or disable the opening of XE files from untrusted sources, including email attachments and downloads, using endpoint protection policies and file type restrictions.
  3. Implement network-level controls to block access to malicious websites that could host crafted XE files, including URL filtering and DNS security solutions.
  4. Enhance user awareness training focused on phishing and social engineering tactics that could deliver malicious files.
  5. Employ application whitelisting to prevent unauthorized execution of untrusted files and processes.
  6. Monitor endpoint and network logs for unusual behavior indicative of exploitation attempts, such as unexpected process launches or memory access violations.
  7. Coordinate with Ashlar-Vellum for timely patch deployment once available; consider contacting vendor support for any interim mitigations or updates.
  8. Use sandboxing or isolated environments for opening XE files when possible to contain potential exploitation.
  9. Maintain up-to-date backups and incident response plans tailored to potential compromise scenarios involving this vulnerability.

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 before the start of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26045.

References

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