An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device on the SCALANCE XM-400, XR-500 (All versions prior to v6.4).
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 |
|---|
| n/a | SCALANCE XM-400, XR-500 | < 6.4 |
| siemens | scalance_xm-400_firmware | < 6.4 |
| siemens | scalance_xm408-4c_firmware | < 6.4 |
| siemens | scalance_xm408-4c_l3_firmware | < 6.4 |
| siemens | scalance_xm408-8c_firmware | < 6.4 |
| siemens | scalance_xm408-8c_l3_firmware | < 6.4 |
| siemens | scalance_xm416-4c_firmware | < 6.4 |
| siemens | scalance_xm416-4c_l3_firmware | < 6.4 |
| siemens | scalance_xr524_firmware | < 6.4 |
| siemens | scalance_xr526_firmware | < 6.4 |
| siemens | scalance_xr528_firmware | < 6.4 |
| siemens | scalance_xr552_firmware | < 6.4 |
Published: 2021-05-12
