CVE-2026-16279Network attack vector

Account access via undisclosed authorization flaw

Published Aug 27, 2026 · Updated Aug 27, 2026

Improper authorization in 3DPassport in Dassault Systèmes 3DSwymer R2023x through R2026x allows remote attackers to access user accounts. Dassault Systèmes has not published the request, input, or authorization operation that fails to enforce account boundaries. Exploitation requires victim user interaction but no prior privileges; success grants access to some user accounts without a reported service interruption.

CVSS severity9.3
Critical
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in 3DPassport in Dassault Systèmes 3DSwymer R2023x through R2026x allows remote attackers to access user accounts. Dassault Systèmes has not published the request, input, or authorization operation that fails to enforce account boundaries. Exploitation requires victim user interaction but no prior privileges; success grants access to some user accounts without a reported service interruption.

The record

CVE
CVE-2026-16279
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Dassault Systèmes
Product
3DSwymer
Classifications
CWE-285
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Release 3DEXPERIENCE R2023x Golden <=Release 3DEXPERIENCE R2023x.FP.CFA.2613
  2. Affected versionversion=Release 3DEXPERIENCE R2024x Golden <=Release 3DEXPERIENCE R2024x.FP.CFA.2632
  3. Affected versionversion=Release 3DEXPERIENCE R2025x Golden <=Release 3DEXPERIENCE R2025x.FP.CFA.2628
  4. Affected versionversion=Release 3DEXPERIENCE R2026x Golden <=Release 3DEXPERIENCE R2026x.FP.CFA.2634

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dassault Systèmes · 3DSwymerversion=Release 3DEXPERIENCE R2023x Golden <=Release 3DEXPERIENCE R2023x.FP.CFA.2613; version=Release 3DEXPERIENCE R2024x Golden <=Release 3DEXPERIENCE R2024x.FP.CFA.2632; version=Release 3DEXPERIENCE R2025x Golden <=Release 3DEXPERIENCE R2025x.FP.CFA.2628; version=Release 3DEXPERIENCE R2026x Golden <=Release 3DEXPERIENCE R2026x.FP.CFA.2634

Published CVSS scores

9.3Dassault SystèmesCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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