# 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 throu…

CVE record · `CVE-2026-7858`

- **Identifiers:** `CVE-2026-7858`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** 3DS
- **Weakness (CWE):** [CWE-502](https://cwe.mitre.org/data/definitions/502.html)
- **Tags:** [Insecure deserialization](https://agentprime.io/advisories/tag/deserialization.md)
- **Technologies:** [Dassault Systèmes Teamwork Cloud - Standard Edition](https://agentprime.io/advisories/technology/dassault-systemes-teamwork-cloud-standard-edition.md) · [Dassault Systèmes Teamwork Cloud - Business Edition](https://agentprime.io/advisories/technology/dassault-systemes-teamwork-cloud-business-edition.md) · [Dassault Systèmes Teamwork Cloud - Business Pro Edition](https://agentprime.io/advisories/technology/dassault-systemes-teamwork-cloud-business-pro-edition.md) · [Dassault Systèmes Teamwork Cloud - Enterprise Edition](https://agentprime.io/advisories/technology/dassault-systemes-teamwork-cloud-enterprise-edition.md) · [Dassault Systèmes Magic Collaboration Studio](https://agentprime.io/advisories/technology/dassault-systemes-magic-collaboration-studio.md)
- **Published:** 1 Jun 2026
- **Updated:** 1 Jun 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: 3DS) at 1 Jun 2026, 07:45 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Dassault Systèmes. Product: Teamwork Cloud - Standard Edition.
  - affected: `No Magic Release 2022x Golden to No Magic Release 2022x Refresh2 HF3, inclusive` (custom)
  - affected: `No Magic Release 2024x Golden to No Magic Release 2024x Refresh3 HF1, inclusive` (custom)
  - affected: `No Magic Release 2026x Golden to No Magic Release 2026x Golden HF2, inclusive` (custom)
  - Other versions: unaffected
- Vendor: Dassault Systèmes. Product: Teamwork Cloud - Business Edition.
  - affected: `No Magic Release 2022x Golden to No Magic Release 2022x Refresh2 HF3, inclusive` (custom)
  - affected: `No Magic Release 2024x Golden to No Magic Release 2024x Refresh3 HF1, inclusive` (custom)
  - affected: `No Magic Release 2026x Golden to No Magic Release 2026x Golden HF2, inclusive` (custom)
  - Other versions: unaffected
- Vendor: Dassault Systèmes. Product: Teamwork Cloud - Business Pro Edition.
  - affected: `No Magic Release 2022x Golden to No Magic Release 2022x Refresh2 HF3, inclusive` (custom)
  - affected: `No Magic Release 2024x Golden to No Magic Release 2024x Refresh3 HF1, inclusive` (custom)
  - affected: `No Magic Release 2026x Golden to No Magic Release 2026x Golden HF2, inclusive` (custom)
  - Other versions: unaffected
- Vendor: Dassault Systèmes. Product: Teamwork Cloud - Enterprise Edition.
  - affected: `No Magic Release 2022x Golden to No Magic Release 2022x Refresh2 HF3, inclusive` (custom)
  - affected: `No Magic Release 2024x Golden to No Magic Release 2024x Refresh3 HF1, inclusive` (custom)
  - affected: `No Magic Release 2026x Golden to No Magic Release 2026x Golden HF2, inclusive` (custom)
  - Other versions: unaffected
- Vendor: Dassault Systèmes. Product: Magic Collaboration Studio.
  - affected: `CATIA Magic Release 2022x Golden to CATIA Magic Release 2022x Refresh2 HF3, inclusive` (custom)
  - affected: `CATIA Magic Release 2024x Golden to CATIA Magic Release 2024x Refresh3 HF1, inclusive` (custom)
  - affected: `CATIA Magic Release 2026x Golden to CATIA Magic Release 2026x Golden HF2, inclusive` (custom)
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 9.8 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (3DS)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0054, the 45th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 1 Jun 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-7858](https://www.cve.org/CVERecord?id=CVE-2026-7858)
- [NVD: CVE-2026-7858](https://nvd.nist.gov/vuln/detail/CVE-2026-7858)

### References from the CNA

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

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-7858>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-7858/>. Everything for agents: <https://agentprime.io/llms.txt>.