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CVE-2025-6205

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in Dassault Systèmes DELMIA Apriso. For every flaw being used in attacks, see Exploited flaws; for Dassault Systèmes’s, see Dassault Systèmes flaws being used in attacks.

CVE-2025-6205 is a security flaw in Dassault Systèmes DELMIA Apriso. Attackers can reach parts of Dassault Systèmes DELMIA Apriso that should be locked to them. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 28 Oct 2025.[1]

Dassault Systèmes DELMIA Apriso is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Dassault Systèmes has published a fix or advice.

Description

CISA calls it a missing authorization in Dassault Systèmes DELMIA Apriso. In its words: “Dassault Systèmes DELMIA Apriso contains a missing authorization vulnerability that could allow an attacker to gain privileged access to the application.”[1]

The underlying weakness is missing authorization (CWE-862), in MITRE’s list of common software weaknesses.[2]

It scores 9.1 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by the organisation that published the CVE using CVSS 3.1.[2]

Affected versions

NVD’s record doesn’t list version ranges for it; Dassault Systèmes’s advisory has them[3]. CISA names the product as Dassault Systèmes DELMIA Apriso.

Most families won’t have Dassault Systèmes DELMIA Apriso; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 28 Oct 2025, 85 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 18 Nov 2025 to fix it.[1]

FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 74%. That’s in the top 1% of the flaws it scores.[4]

CISA assesses it as automatable: attackers can run it against many targets at once.

CISA doesn’t say who was attacked, or how.

Fix

Dassault Systèmes has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”[1]

  1. Check whether you use it.Dassault Systèmes DELMIA Apriso is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
  2. Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 18 Nov 2025 to fix it.
  3. If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.

You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.

Timeline

DateEvent
The flaw is made public in the National Vulnerability Database, with a severity score of 9.1.[2]
CISA adds it to its catalog of flaws known to be used in attacks.[1]
CISA’s deadline for US government agencies to fix it.[1]
FIRST puts the odds of it being used in attacks in the next 30 days at 74%.[4]

See also

Other Dassault Systèmes DELMIA Apriso flaws

Other missing authorization flaws

  • CVE-2024-57726, SimpleHelp: missing authorization ·
  • CVE-2023-52163, Digiever DS-2105 Pro: missing authorization ·
  • CVE-2025-40602, SonicWall SMA1000 appliance: sMA1000 missing authorization ·
  • CVE-2025-20362, Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense: secure firewall adaptive security (ASA) appliance and secure firewall threat defense (FTD) missing authorization ·
  • CVE-2021-3493, Linux Kernel: privilege escalation ·

Added the same day

  • CVE-2025-6204, Dassault Systèmes DELMIA Apriso: code injection ·

Every Dassault Systèmes flaw on CISA’s list · Everything added in October 2025

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “Dassault Systèmes DELMIA Apriso Missing Authorization Vulnerability”. Known Exploited Vulnerabilities Catalog, added 28 Oct 2025.
  2. ^ National Institute of Standards and Technology. “CVE-2025-6205 Detail”. National Vulnerability Database, published 4 Aug 2025.
  3. ^ Dassault Systèmes. Advisories and fixes: 3ds.com.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.737, percentile 99.5, 31 Oct 2026.
  5. CVE Program. “CVE-2025-6205”. The official CVE record.

This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.