What’s Vulnerable › Vulnerabilities

CVE-2021-32994: Softing OPC-UA C++ SDK Improper Restriction of Operations within the Bounds of a Memory Buffer

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-04 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Softing OPC UA C++ SDK (Software Development Kit): from 5.59.0 before 5.65.0 — fixed in 5.65.0

How to fix

Upgrade to a fixed version: Softing OPC UA C++ SDK (Software Development Kit) 5.65.0. Check the vendor advisory for mitigations.

References

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

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