CVE-2021-34086

8.8 HIGH 0.5% exploit odds Fix listed

What it is

In Ultimaker S3 3D printer, Ultimaker S5 3D printer, Ultimaker 3 3D printer S-line through 6.3 and Ultimaker 3 through 5.2.16, the local webserver hosts APIs vulnerable to CSRF. They do not verify incoming requests.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2022-01-10 14:10 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:55 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 8.8 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2022-01-10 14:10 UTC
Last modified: 2026-06-17 03:55 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-352 · Cross-site request forgery
Record status: Modified

Affected

Ultimaker s3 Firmware ≤ 6.3
Ultimaker s5 Firmware ≤ 6.3
Ultimaker 3 Firmware ≤ 5.2.16

Attack profile CVSS 3.1 · 8.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-34086.md and follow it. Check whether this project is affected by CVE-2021-34086. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record