CVE-2021-22284

HIGHNVD 8.48.4—

8.4

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.

CVSS v3: 8.4
EG Score: 8.4(medium)
EPSS: 65.2%
KEV: Not listed

Published

February 4, 2022

Last Modified

November 21, 2024

References (2)

cybersecurity@chhttps://search.abb.com/library/Download.aspx?DocumentID=7PAA000908&LanguageCode=en&DocumentPartId=&Action=Launch
af854a3a-2127-422b-91ae-364da2661108https://search.abb.com/library/Download.aspx?DocumentID=7PAA000908&LanguageCode=en&DocumentPartId=&Action=Launch

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-732Incorrect Permission Assignment for Critical Resource

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 03:40 UTCEG score recompute
2026-05-26 03:40 UTCGHSA enrichment
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-22284?

CVE-2021-22284 is a high vulnerability published on February 4, 2022. 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.

When was CVE-2021-22284 disclosed?

CVE-2021-22284 was first published in the National Vulnerability Database on February 4, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-22284 actively exploited?

CVE-2021-22284 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-22284?

CVE-2021-22284 has a CVSS v3 base score of 8.4 (NVD).

How do I remediate CVE-2021-22284?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22284, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-22284

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-22284?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)