A vulnerability has been identified in SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions). Specially crafted packets sent to TCP port 102 could cause a Denial-of-Service condition on the affected devices. A cold restart might be necessary in order to recover.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | AV: P→N, AC: H→L, PR: H→N, UI: A→N, VA: N→H | 0.0 → 4.6 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| Siemens | SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants) | All versions |
| Siemens | SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) | All versions |
| Siemens | SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) | All versions |
| siemens | simatic_net_cp_343-1_advanced_firmware | All versions |
| siemens | simatic_net_cp_343-1_lean_firmware | All versions |
| siemens | simatic_net_cp_343-1_standard_firmware | All versions |
Published: 2021-05-12
