CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HCVE-2021-45117
Medium (6.5). EPSS 1.4% chance of exploitation in the next 30 days.
The OPC autogenerated ANSI C stack stubs (in the NodeSets) do not handle all error cases. This can lead to a NULL pointer dereference.
Severity
- EPSS
- 1.4% chance of exploitation in the next 30 days; higher than 72% of CVEs (scores of 2026-10-31)
- CWE
- CWE-476
- Published
- Modified
- Record from
- the NVD, synced
Affected
- opcfoundation:ua-nodeset
- siemens:simatic_net_pc
- siemens:sitop_manager
- siemens:telecontrol_server_basic
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf
- https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-45117.pdf
- https://www.youtube.com/watch?v=qv-RBdCaV4k
- https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf
- https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-45117.pdf