---
title: "CVE-2026-19781: Ashlar-Vellum Cobalt - Remote Code Execution"
description: "Ashlar-Vellum Cobalt contains a heap-based buffer overflow caused by improper validation of user-supplied data length in VS file parsing, letting remote attackers execute arbitrary code, exploit requires user interaction."
url: https://panop.io/threat-heartbeat/CVE-2026-19781/
---

# CVE-2026-19781 Ashlar-Vellum Cobalt - Remote Code Execution

Ashlar-Vellum Cobalt contains a heap-based buffer overflow caused by improper validation of user-supplied data length in VS file parsing, letting remote attackers execute arbitrary code, exploit requires user interaction.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-19781)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to the latest version of Ashlar-Vellum Cobalt.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-19781](https://nvd.nist.gov/vuln/detail/CVE-2026-19781)
- [https://www.zerodayinitiative.com/advisories/ZDI-26-587/](https://www.zerodayinitiative.com/advisories/ZDI-26-587/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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