A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.5.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.9.2), SIMATIC S7-1500 Software Controller (All versions < V21.9), SIMATIC S7-PLCSIM Advanced (All versions < V4.0), SINAMICS PERFECT HARMONY GH180 Drives (Drives manufactured before 2021-08-13), SINUMERIK MC (All versions < V6.15), SINUMERIK ONE (All versions < V6.15). Affected devices are vulnerable to a memory protection bypass through a specific operation. A remote unauthenticated attacker with network access to port 102/tcp could potentially write arbitrary data and code to protected memory areas or read sensitive data to launch further attacks.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 7.2 → 8.2 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 7.2 → 7.2 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 7.2 |
Affected Software
| Vendor | Product | Version |
|---|
| siemens | et_200sp_open_controller_firmware | All versions |
| siemens | s7-1200_cpu_firmware | < 4.5.0 |
| siemens | s7-1500_cpu_firmware | < 2.9.2 |
| Siemens | SIMATIC Drive Controller family | < 2.9.2 |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) | All versions |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) | < 21.9 |
| Siemens | SIMATIC S7-1200 CPU family (incl. SIPLUS variants) | < 4.5.0 |
| Siemens | SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) | < 2.9.2 |
| Siemens | SIMATIC S7-1500 Software Controller | < 21.9 |
| Siemens | SIMATIC S7-PLCSIM Advanced | < 4.0 |
| siemens | simatic_driver_controller_firmware | < 2.9.2 |
| siemens | simatic_s7-1500__software_controller | All versions |
| siemens | simatic_s7-plcsim_advanced | < 4.0 |
| Siemens | SINAMICS PERFECT HARMONY GH180 Drives | < 2021-08-13 |
| Siemens | SINUMERIK MC | < 6.15 |
| Siemens | SINUMERIK ONE | < 6.15 |
Published: 2021-05-28
