How severe is CVE-2022-37012?

CVE-2022-37012 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-2022-37012 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-37012?

CVE-2022-37012 affects Unified-automation Opc Ua C++ Demo Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-37012?

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-2022-37012 published?

CVE-2022-37012 was published on 2023-03-29 and last updated on 2026-06-17.

CVE-2022-37012

CVE-2022-37012 is a high-severity vulnerability in Unified-automation Opc Ua C++ Demo Server 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-911.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-911
Affected product: Unified-automation Opc Ua C++ Demo Server
Published: 2023-03-29
Last modified: 2026-06-17

Description

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C++ Demo Server 1.7.6-537. Authentication is not required to exploit this vulnerability. The specific flaw exists within the OpcUa_SecureListener_ProcessSessionCallRequest method. A crafted OPC UA message can force the server to incorrectly update a reference count. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-16927.

Frequently asked questions

What is CVE-2022-37012?: This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C++ Demo Server 1.7.6-537. Authentication is not required to exploit this vulnerability. The specific flaw exists within the OpcUa_SecureListener_ProcessSessionCallRequest method. A crafted OPC UA message can force the server to incorrectly update a reference count. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-16927.
How severe is CVE-2022-37012?: CVE-2022-37012 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-2022-37012 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-37012?: CVE-2022-37012 affects Unified-automation Opc Ua C++ Demo Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-37012?: 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-2022-37012 published?: CVE-2022-37012 was published on 2023-03-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:unified-automation:opc_ua_c\+\+_demo_server:1.7.6.537:*:*:*:*:*:*:*

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