How severe is CVE-2021-22284?

CVE-2021-22284 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22284 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22284?

CVE-2021-22284 affects Abb Opc Server For Ac 800m. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22284?

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-2021-22284 published?

CVE-2021-22284 was published on 2022-02-04 and last updated on 2026-06-17.

CVE-2021-22284

CVE-2021-22284 is a high-severity vulnerability in Abb Opc Server For Ac 800m with a CVSS 3.x base score of 8.4. 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-732.

Key facts

Severity: High (CVSS 3.x base score 8.4)
CVSS v2: 6.5
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Abb Opc Server For Ac 800m
Published: 2022-02-04
Last modified: 2026-06-17

Description

Incorrect Permission Assignment for Critical Resource vulnerability in OPC Server for AC 800M allows an attacker to execute arbitrary code in the node running the AC800M OPC Server.

Frequently asked questions

What is CVE-2021-22284?: Incorrect Permission Assignment for Critical Resource vulnerability in OPC Server for AC 800M allows an attacker to execute arbitrary code in the node running the AC800M OPC Server.
How severe is CVE-2021-22284?: CVE-2021-22284 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22284 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22284?: CVE-2021-22284 affects Abb Opc Server For Ac 800m. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22284?: 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-2021-22284 published?: CVE-2021-22284 was published on 2022-02-04 and last updated on 2026-06-17.

References

https://search.abb.com/library/Download.aspx?DocumentID=7PAA000908&LanguageCode=en&DocumentPartId=&Action=Launch

Affected products (1)

cpe:2.3:a:abb:opc_server_for_ac_800m:*:*:*:*:*:*:*:*

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