How severe is CVE-2019-5620?

CVE-2019-5620 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-5620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 71% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5620?

CVE-2019-5620 affects Hitachienergy Microscada Pro Sys600. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-5620?

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

When was CVE-2019-5620 published?

CVE-2019-5620 was published on 2020-04-29 and last updated on 2026-06-17.

CVE-2019-5620

CVE-2019-5620 is a critical-severity vulnerability in Hitachienergy Microscada Pro Sys600 with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 71% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 71% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Hitachienergy Microscada Pro Sys600
Published: 2020-04-29
Last modified: 2026-06-17

Description

ABB MicroSCADA Pro SYS600 version 9.3 suffers from an instance of CWE-306: Missing Authentication for Critical Function.

Frequently asked questions

What is CVE-2019-5620?: ABB MicroSCADA Pro SYS600 version 9.3 suffers from an instance of CWE-306: Missing Authentication for Critical Function.
How severe is CVE-2019-5620?: CVE-2019-5620 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-5620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 71% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5620?: CVE-2019-5620 affects Hitachienergy Microscada Pro Sys600. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-5620?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-5620 published?: CVE-2019-5620 was published on 2020-04-29 and last updated on 2026-06-17.

References

https://www.rapid7.com/db/modules/exploit/windows/scada/abb_wserver_exec

Affected products (1)

cpe:2.3:a:hitachienergy:microscada_pro_sys600:9.3:*:*:*:*:*:*:*

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