What is CVE-2021-33009?

CVE-2021-33009 is a high-severity vulnerability in Myscada Mypro, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.5/10. Published 2022-05-13.

How severe is CVE-2021-33009?

High severity. CVSS v3 base score is 7.5 out of 10.

Arbitrary file upload in Myscada Mypro

CVE-2021-33009

mySCADA myPRO versions prior to 8.20.0 allows an unauthenticated remote attacker to upload arbitrary files to the file system.

Vulnerability class: Unrestricted File Upload

Published 2022-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.013 (68.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.000

Affected products

Myscada Mypro — versions unspecified

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.cisa.gov/uscert/ics/advisories/icsa-21-217-03 (US Government Resource, Third Party Advisory)
www.myscada.org/version-8-20-0-released-security-update (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-33009?: CVE-2021-33009 is a high-severity vulnerability in Myscada Mypro, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.5/10. Published 2022-05-13.
How severe is CVE-2021-33009?: High severity. CVSS v3 base score is 7.5 out of 10.