CVE-2021-42577
HIGHCVSS 7.5/10EPSS 0.92%
Last modified
CVE-2021-42577 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Softing OPC UA C++ SDK before 5.70. A malformed OPC/UA message abort packet makes the client crash with a NULL pointer dereference.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.
Description
An issue was discovered in Softing OPC UA C++ SDK before 5.70. A malformed OPC/UA message abort packet makes the client crash with a NULL pointer dereference.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Softing | Datafeed Opc Suite | <= 5.19 |
| Softing | Opc Ua C\+\+ Software Development Kit | < 5.70.0 |
| Softing | Secure Integration Server | <= 1.22 |
References
- https://softing.comVendor Advisory
- https://softing.comVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42577?
An issue was discovered in Softing OPC UA C++ SDK before 5.70. A malformed OPC/UA message abort packet makes the client crash with a NULL pointer dereference.
How severe is CVE-2021-42577?
CVE-2021-42577 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42577?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-42577?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST