ZDI-CAN-26626: ZDI-25-954: (0Day) Ashlar-Vellum Cobalt XE File Parsing Integer Overflow 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 an integer overflow before allocating a buffer. 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-2025-11463.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-26626?
ZDI-CAN-26626 is classified as a high severity vulnerability due to its ability to allow remote code execution.
How do I fix ZDI-CAN-26626?
To mitigate ZDI-CAN-26626, ensure that you apply the latest security updates provided by Ashlar-Vellum for the Cobalt software.
What is the attack vector for ZDI-CAN-26626?
The attack vector for ZDI-CAN-26626 requires user interaction, such as visiting a malicious webpage or opening a malicious file.
Which software is affected by ZDI-CAN-26626?
ZDI-CAN-26626 affects the Ashlar-Vellum Cobalt software.
Can ZDI-CAN-26626 be exploited without user interaction?
No, ZDI-CAN-26626 cannot be exploited without user interaction.