What is the severity of ZDI-25-123?

ZDI-25-123 has a high severity rating due to its potential for remote code execution.

How do I fix ZDI-25-123?

To fix ZDI-25-123, update Ashlar-Vellum Cobalt to the latest version provided by the vendor.

What type of vulnerability is ZDI-25-123?

ZDI-25-123 is classified as a remote code execution vulnerability that requires user interaction.

Which software is affected by ZDI-25-123?

ZDI-25-123 specifically affects Ashlar-Vellum Cobalt installations.

Is user interaction required to exploit ZDI-25-123?

Yes, exploitation of ZDI-25-123 requires user interaction, such as visiting a malicious web page or opening a malicious file.

Vulnerability/
ZDI-25-123

high

7.8

10/3/2025

11/3/2025

ZDI-25-123: (0Day) Ashlar-Vellum Cobalt VC6 File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

First published: Mon Mar 10 2025(Updated: )

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 VC6 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Affected Software	Affected Version	How to fix
Ashlar-Vellum Cobalt
Ashlar-Vellum Cobalt

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Reference Links

Frequently Asked Questions

What is the severity of ZDI-25-123?
ZDI-25-123 has a high severity rating due to its potential for remote code execution.
How do I fix ZDI-25-123?
To fix ZDI-25-123, update Ashlar-Vellum Cobalt to the latest version provided by the vendor.
What type of vulnerability is ZDI-25-123?
ZDI-25-123 is classified as a remote code execution vulnerability that requires user interaction.
Which software is affected by ZDI-25-123?
ZDI-25-123 specifically affects Ashlar-Vellum Cobalt installations.
Is user interaction required to exploit ZDI-25-123?
Yes, exploitation of ZDI-25-123 requires user interaction, such as visiting a malicious web page or opening a malicious file.

collector/zdi-published
source/ZDI
alias/ZDI-CAN-25252
agent/last-modified-date
agent/title
agent/source
agent/type
agent/first-publish-date
agent/guess-ai
agent/software-canonical-lookup
collector/zdi-advisory
alias/ZDI-25-123
alias/CVE-2025-2019
agent/references
agent/severity
agent/tags
agent/softwarecombine
agent/description
agent/event
vendor/ashlar-vellum
canonical/ashlar-vellum cobalt

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