An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66.
Priority LOW 35CWE-843Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-843 and the CVSS impact.
Summary
An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66. Remote attackers to cause a denial of service (DoS) by sending crafted messages to a OPC/UA client. The client process may crash unexpectedly because of a wrong type cast, and must be restarted.
Why it matters now
EPSS 0.01309 70th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:softing:datafeed_opc_suite:*:*:*:*:*:*:*:* | before 5.18 | Vulnerable | Softing |
| cpe:2.3:a:softing:opc:*:*:*:*:*:*:*:* | before 5.66 | Vulnerable | Softing |
| cpe:2.3:a:softing:secure_integration_server:*:*:*:*:*:*:*:* | up to 1.22 | Vulnerable | Softing |
| cpe:2.3:a:softing:th_scope:*:*:*:*:*:*:*:* | 3.5 | Vulnerable | Softing |
- cpe:2.3:a:softing:datafeed_opc_suite:*:*:*:*:*:*:*:* Versions before 5.18 Vulnerable ·Softing
- cpe:2.3:a:softing:opc:*:*:*:*:*:*:*:* Versions before 5.66 Vulnerable ·Softing
- cpe:2.3:a:softing:secure_integration_server:*:*:*:*:*:*:*:* Versions up to 1.22 Vulnerable ·Softing
- cpe:2.3:a:softing:th_scope:*:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·Softing
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-40871
- 2026-10-03 Alias added: GHSA-jh98-gv77-c9cx
References
More Softing Datafeed Opc Suite vulnerabilities
- TI-2021-18857 An issue was discovered in Softing OPC UA C++ SDK before 5.70. CVSS 3.1HIGH 7.5
- TI-2021-17794 An issue was discovered in Softing Industrial Automation OPC UA C++ SDK before 5.66, and… CVSS 3.1HIGH 7.5
- TI-2021-18699 An issue was discovered in Softing OPC UA C++ SDK before 5.70. CVSS 3.1MEDIUM 6.5
Sources
- CVE-2021-40871 · CVE Program
- CVE-2021-40871 · NVD
- FIRST EPSS
- GHSA-jh98-gv77-c9cx · GitHub Advisory Database · CC BY 4.0
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