How severe is CVE-2022-30551?

CVE-2022-30551 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 none, and availability high.

Is CVE-2022-30551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-30551?

CVE-2022-30551 affects Opcfoundation Ua-java. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-30551?

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-2022-30551 published?

CVE-2022-30551 was published on 2022-05-20 and last updated on 2026-06-17.

CVE-2022-30551

CVE-2022-30551 is a high-severity vulnerability in Opcfoundation Ua-java 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Opcfoundation Ua-java
Published: 2022-05-20
Last modified: 2026-06-17

Description

OPC UA Legacy Java Stack 2022-04-01 allows a remote attacker to cause a server to stop processing messages by sending crafted messages that exhaust available resources.

Frequently asked questions

What is CVE-2022-30551?: OPC UA Legacy Java Stack 2022-04-01 allows a remote attacker to cause a server to stop processing messages by sending crafted messages that exhaust available resources.
How severe is CVE-2022-30551?: CVE-2022-30551 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 none, and availability high.
Is CVE-2022-30551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-30551?: CVE-2022-30551 affects Opcfoundation Ua-java. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-30551?: 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-2022-30551 published?: CVE-2022-30551 was published on 2022-05-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opcfoundation:ua-java:2022-04-01:*:*:*:*:*:*:*

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