How severe is CVE-2021-33009?

CVE-2021-33009 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-33009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33009?

CVE-2021-33009 affects Myscada Mypro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33009?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-33009 published?

CVE-2021-33009 was published on 2022-05-13 and last updated on 2026-06-17.

CVE-2021-33009

CVE-2021-33009 is a high-severity vulnerability in Myscada Mypro with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Myscada Mypro
Published: 2022-05-13
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-33009?: mySCADA myPRO versions prior to 8.20.0 allows an unauthenticated remote attacker to upload arbitrary files to the file system.
How severe is CVE-2021-33009?: CVE-2021-33009 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-33009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33009?: CVE-2021-33009 affects Myscada Mypro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-33009 published?: CVE-2021-33009 was published on 2022-05-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:myscada:mypro:*:*:*:*:*:*:*:*

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