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-25-954?
The severity of ZDI-25-954 is high due to its potential to allow remote code execution.
How do I fix ZDI-25-954?
To fix ZDI-25-954, ensure you update Ashlar-Vellum Cobalt to the latest version that addresses this vulnerability.
Who is affected by ZDI-25-954?
ZDI-25-954 affects users of Ashlar-Vellum Cobalt who visit malicious pages or open malicious files.
What type of vulnerability is ZDI-25-954?
ZDI-25-954 is a remote code execution vulnerability that requires user interaction for exploitation.
What are the risks associated with ZDI-25-954?
The risks associated with ZDI-25-954 include unauthorized remote access and execution of arbitrary code on the affected system.