What is CVE-2026-85217?

CVE-2026-85217 is Man-in-the-Middle (MITM) Vulnerability in Autodesk Fusion Desktop. The supplied enrichment data classifies it as Unclassified mapped to CWE-15 CWE-15.

Which versions are affected?

Affected product and version evidence is listed in the product table above. Current public advisories should be checked for exact version scope before patch targeting is finalized.

Is there active exploitation?

Active exploitation is not confirmed from current sources for CVE-2026-85217. If exploitation is not confirmed from current sources, teams should document that status and continue monitoring KEV, vendor, and telemetry updates.

No. CVE-2026-85217 is not listed in CISA KEV in the supplied enrichment data. KEV status should be monitored because it can change after initial disclosure or after exploitation becomes publicly confirmed.

Is there a public exploit?

A public PoC is not confirmed from current sources for CVE-2026-85217. Public exploit or PoC availability should raise triage priority, especially for exposed or business-critical systems.

How can defenders detect it?

Start with Not reported where available. Look for vulnerability-class behavior, product errors, suspicious authentication events, exploit probes, and abnormal process activity based only on evidence that applies to the affected product.

How should teams prioritize it?

Prioritize CVE-2026-85217 using CVSS 8.6, EPSS 0%, KEV status, public PoC status, and asset exposure. Internet-facing, privileged, or business-critical deployments should be handled first.

Are workarounds available?

The supplied mitigation guidance says to apply vendor patches and restrict external exposure until fixed. Fixed-version evidence is listed in the mitigation section above.

Which threat actors are linked publicly?

No public threat actor linkage is confirmed from current sources. Do not attribute exploitation to a threat actor unless the source evidence explicitly supports that linkage.

What should be done in the next 24 hours?

Identify exposed assets running affected vendor/product/version combinations. Prioritize based on EPSS, PoC availability, and external exposure. Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class. Open remediation tickets with affected assets, owners, evidence status, and detection coverage so decisions are traceable.

high

CVE-2026-85217

CVE-2026-85217 — Man-in-the-Middle (MITM) Vulnerability in Autodesk Fusion Desktop

A maliciously crafted add-in, when installed and executed in Autodesk Fusion Desktop, can modify persistent network proxy settings without user notification or consent. A successful exploit may allow an attacker to redirect authenticated Fusion network traffic through an attacker-controlled proxy, potentially exposing sensitive information with the current user.

Published Sep 10, 2026Updated Sep 10, 2026Sources: NVD, Autodesk (CNA), GitHub, GitHub Security Advisory, SOCRadar CTI

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Unreported

no source claims exploitation

EPSS

ahead of 0% of scored CVEs

Affects

Autodesk

Fusion

CVSS base

8.6

high

Remediation

The vendor's own words where we have them.

Upgrade Fusion to a fixed release. Apply vendor patches per advisory and restrict external exposure of the affected component until patched.

First 24 hours

Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.

Identify exposed assets running affected vendor/product/version combinations.
Prioritize based on EPSS, PoC availability, and external exposure.
Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.

Affected scope

Vendor, product and version as the advisories word them.

Vendor	Product	Versions	Status
Autodesk	Fusion	2705.0.0 to < 2705.1.11	Vulnerable

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Availability

High

Confidentiality

High

Integrity

High

Scope

Changed

Attack Complexity

Low

Attack Vector

Local

Privileges Req

None

User Interaction

Required

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
8.6	CVSS 3.1	high	1.8	6	NVD, Autodesk (CNA), GHSA

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

What this weakness leads to

MITRE's own consequences and mitigations for the weakness class — the authority's wording, not guidance derived from the CVSS vector.

MITRE

CWE-15 · External Control of System or Configuration Setting

Varies by Context::

Mitigation: Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

Weakness & attack patterns

CWE-15

Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.

CAPEC-13 · Subverting Environment Variable ValuesCAPEC-270 · Modification of Registry Run KeysCAPEC-176 · Configuration/Environment ManipulationCAPEC-69 · Target Programs with Elevated PrivilegesCAPEC-146 · XML Schema PoisoningCAPEC-77 · Manipulating User-Controlled VariablesCAPEC-76 · Manipulating Web Input to File System CallsCAPEC-271 · Schema PoisoningCAPEC-203 · Manipulate Registry Information

T1562.003Impair Defenses: Impair Command History Logging
T1574.006Hijack Execution Flow: Dynamic Linker Hijacking
T1574.007Hijack Execution Flow: Path Interception by PATH Environment Variable

Timeline

What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.

2026
Added · CVSS 3.1 8.6 (AV:L)
Sep 10, 2026 · NVD
Initial · CVE published
Sep 10, 2026 · NVD
Added · GHSA-637g-92jv-5383 published (high)
Sep 10, 2026 · GitHub Security Advisory
CVE published by MITRE.
Sep 10, 2026 · SOCRadar CTI

References

4 on the record

dl.appstreaming.autodesk.com/production/installers/Fusion%20Client%20Downloader.exe
Vendor Advisory
www.autodesk.com/trust/security-advisories/adsk-sa-2026-0016
Vendor Advisory
nvd.nist.gov/vuln/detail/CVE-2026-85217
NVD
github.com/advisories/GHSA-637g-92jv-5383
Exploit, Third Party Advisory

Elsewhere on this site

Autodeskevery CVE for this vendor
Unclassifiedsame class
CWE-15other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record1

What should defenders know first?

CVE-2026-85217 is Man-in-the-Middle (MITM) Vulnerability in Autodesk Fusion Desktop, a high vulnerability affecting Fusion from Autodesk. The current evidence does not list it in CISA KEV, and the exploit status is: Active exploitation is not confirmed from current sources for CVE-2026-85217. Public exploit evidence is: A public PoC is not confirmed from current sources for CVE-2026-85217. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 8.6 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.