What is CVE-2021-33209?

CVE-2021-33209 is a medium-severity vulnerability in Fimer Aurora Vision, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 5.3/10. Published 2021-11-03.

How severe is CVE-2021-33209?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Fimer Aurora Vision

CVE-2021-33209

An issue was discovered in Fimer Aurora Vision before 2.97.10. The response to a failed login attempt discloses whether the username or password is wrong, helping an attacker to enumerate usernames. This can make a brute-force attack easier.

Published 2021-11-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Fimer Aurora Vision

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

twitter.com/FIMERspa (Third Party Advisory)
fimeronline.sharepoint.com/:b:/s/GLB-publicsp/EeKCnV76jG5Pn9Ud30fTlesBlk-SZS3uF… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-33209?: CVE-2021-33209 is a medium-severity vulnerability in Fimer Aurora Vision, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 5.3/10. Published 2021-11-03.
How severe is CVE-2021-33209?: Medium severity. CVSS v3 base score is 5.3 out of 10.