How severe is CVE-2021-27505?

CVE-2021-27505 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 high, integrity none, and availability none.

Is CVE-2021-27505 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27505?

CVE-2021-27505 affects Myscada Mypro. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27505?

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-2021-27505 published?

CVE-2021-27505 was published on 2022-05-13 and last updated on 2026-06-17.

CVE-2021-27505

CVE-2021-27505 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-548.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-548
Affected product: Myscada Mypro
Published: 2022-05-13
Last modified: 2026-06-17

Description

mySCADA myPRO versions prior to 8.20.0 does not restrict unauthorized read access to sensitive directory listing information.

Frequently asked questions

What is CVE-2021-27505?: mySCADA myPRO versions prior to 8.20.0 does not restrict unauthorized read access to sensitive directory listing information.
How severe is CVE-2021-27505?: CVE-2021-27505 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 high, integrity none, and availability none.
Is CVE-2021-27505 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27505?: CVE-2021-27505 affects Myscada Mypro. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27505?: 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-2021-27505 published?: CVE-2021-27505 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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