CVE-2021-33009Network attack vector

Unauthenticated arbitrary file upload

Published May 13, 2022 · Updated Apr 16, 2025

Unrestricted file upload in mySCADA Technologies myPRO before 8.20.0 allows remote attackers to write arbitrary files to the filesystem. The vendor and CISA identify an unauthenticated upload path but do not publish the affected endpoint or its file-validation logic. No account or user interaction is required; the documented consequence is attacker-controlled file creation, with no reported confidentiality or availability impact.

CVSS severity7.5
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in mySCADA Technologies myPRO before 8.20.0 allows remote attackers to write arbitrary files to the filesystem. The vendor and CISA identify an unauthenticated upload path but do not publish the affected endpoint or its file-validation logic. No account or user interaction is required; the documented consequence is attacker-controlled file creation, with no reported confidentiality or availability impact.

The record

CVE
CVE-2021-33009
Published
May 13, 2022
Updated
Apr 16, 2025
Vendor
mySCADA Technologies
Product
myPRO
Classifications
CWE-434, T0819
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <8.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

mySCADA Technologies · myPROversion=unspecified <8.20.0

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T0819Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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