ZDI-CAN-26235: ZDI-25-720: (0Day) Ashlar-Vellum Cobalt CO 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 CO 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.
Other sources
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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2025-8003.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-26235?
The severity of ZDI-CAN-26235 is significant due to its potential for remote code execution.
How do I fix ZDI-CAN-26235?
To fix ZDI-CAN-26235, ensure that you apply recommended patches from Ashlar-Vellum for Cobalt.
What are the risks associated with ZDI-CAN-26235?
The risks associated with ZDI-CAN-26235 include unauthorized code execution which can lead to data breaches or system compromise.
Who is affected by ZDI-CAN-26235?
ZDI-CAN-26235 affects users of Ashlar-Vellum's Cobalt software, specifically installations that have not been updated.
Is user interaction required to exploit ZDI-CAN-26235?
Yes, user interaction is required, as the target must visit a malicious page or open a malicious file for the exploit to work.