The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases.
Priority LOW 32CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- 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-476.
Summary
The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.
Why it matters now
EPSS 0.01417 72nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:opcfoundation:ua-nodeset:*:*:*:*:*:*:*:* | before 1.05.01 | Vulnerable | OPC Foundation |
| cpe:2.3:a:siemens:simatic_net_pc:14:-:*:*:*:*:*:* | 14 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_net_pc:15:-:*:*:*:*:*:* | 15 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_net_pc:16:-:*:*:*:*:*:* | 16 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_net_pc:17:-:*:*:*:*:*:* | 17 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sitop_manager:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:a:siemens:telecontrol_server_basic:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Siemens |
- cpe:2.3:a:opcfoundation:ua-nodeset:*:*:*:*:*:*:*:* Versions before 1.05.01 Vulnerable ·OPC Foundation
- cpe:2.3:a:siemens:simatic_net_pc:14:-:*:*:*:*:*:* Versions 14 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_net_pc:15:-:*:*:*:*:*:* Versions 15 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_net_pc:16:-:*:*:*:*:*:* Versions 16 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_net_pc:17:-:*:*:*:*:*:* Versions 17 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sitop_manager:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:a:siemens:telecontrol_server_basic:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-45117
- 2026-10-03 Alias added: GHSA-v4v7-f2qj-8939
References
Sources
- CVE-2021-45117 · CVE Program
- CVE-2021-45117 · NVD
- FIRST EPSS
- GHSA-v4v7-f2qj-8939 · GitHub Advisory Database · CC BY 4.0
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