ASHLAR-VELLUM COBALT · CVE-2026-121742 · Other
NO FIX YET · SEE WHAT TO DO
Ashlar-Vellum Cobalt mishandles objects while parsing XE files, a use-after-free that lets a remote attacker run arbitrary code in the current process. The victim must open a malicious file or visit a malicious page for it to trigger.
first public Nov 12, 2026 · 2 sources
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Anyone running Ashlar-Vellum Cobalt (CAD software on Windows) who opens an XE file from an untrusted source. The attack needs the user to open a malicious file or visit a malicious page. Teams that don't use Cobalt can skip it.
Not affected if no-cobalt-installed
Who cares ashlar-vellum, cobalt, desktop, user-interaction, windows
Ashlar-Vellum Cobalt XE File Parsing Use-After-Free 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 validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28757.
This page as .md · .json · CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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