How severe is CVE-2023-32787?

CVE-2023-32787 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-2023-32787 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-32787?

CVE-2023-32787 primarily affects Opcfoundation Ua Java Legacy. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-32787?

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-2023-32787 published?

CVE-2023-32787 was published on 2023-05-15 and last updated on 2026-06-17.

CVE-2023-32787

CVE-2023-32787 is a high-severity vulnerability in Opcfoundation Ua Java Legacy 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)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Opcfoundation Ua Java Legacy
Published: 2023-05-15
Last modified: 2026-06-17

Description

The OPC UA Legacy Java Stack before 6f176f2 enables an attacker to block OPC UA server applications via uncontrolled resource consumption so that they can no longer serve client applications.

Frequently asked questions

What is CVE-2023-32787?: The OPC UA Legacy Java Stack before 6f176f2 enables an attacker to block OPC UA server applications via uncontrolled resource consumption so that they can no longer serve client applications.
How severe is CVE-2023-32787?: CVE-2023-32787 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-2023-32787 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-32787?: CVE-2023-32787 primarily affects Opcfoundation Ua Java Legacy. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-32787?: 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-2023-32787 published?: CVE-2023-32787 was published on 2023-05-15 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:opcfoundation:ua_java_legacy:*:*:*:*:*:*:*:*
cpe:2.3:a:prosysopc:ua_historian:*:*:*:*:*:*:*:*
cpe:2.3:a:prosysopc:ua_modbus_server:*:*:*:*:*:*:*:*
cpe:2.3:a:prosysopc:ua_simulation_server:*:*:*:*:*:*:*:*

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