How severe is CVE-2021-32994?

CVE-2021-32994 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-2021-32994 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32994?

CVE-2021-32994 affects Softing Opc Ua C++ Software Development Kit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32994?

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-2021-32994 published?

CVE-2021-32994 was published on 2022-04-04 and last updated on 2026-06-17.

CVE-2021-32994

CVE-2021-32994 is a high-severity vulnerability in Softing Opc Ua C++ Software Development Kit 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Softing Opc Ua C++ Software Development Kit
Published: 2022-04-04
Last modified: 2026-06-17

Description

Softing OPC UA C++ SDK (Software Development Kit) versions from 5.59 to 5.64 exported library functions don't properly validate received extension objects, which may allow an attacker to crash the software by sending a variety of specially crafted packets to access several unexpected memory locations.

Frequently asked questions

What is CVE-2021-32994?: Softing OPC UA C++ SDK (Software Development Kit) versions from 5.59 to 5.64 exported library functions don't properly validate received extension objects, which may allow an attacker to crash the software by sending a variety of specially crafted packets to access several unexpected memory locations.
How severe is CVE-2021-32994?: CVE-2021-32994 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-2021-32994 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32994?: CVE-2021-32994 affects Softing Opc Ua C++ Software Development Kit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32994?: 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-2021-32994 published?: CVE-2021-32994 was published on 2022-04-04 and last updated on 2026-06-17.

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-168-02

Affected products (1)

cpe:2.3:a:softing:opc_ua_c\+\+_software_development_kit:*:*:*:*:*:*:*:*

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