CVE-2020-15782

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-05-28 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

Siemens Et 200Sp Open Controller Firmware: all versions
Siemens S7-1200 Cpu Firmware: before 4.5.0 — fixed in 4.5.0
Siemens S7-1500 Cpu Firmware: before 2.9.2 — fixed in 2.9.2
Siemens Simatic Driver Controller Firmware: before 2.9.2 — fixed in 2.9.2
Siemens Simatic S7-1500 Software Controller: all versions
Siemens SIMATIC S7-PLCSIM Advanced: before 4.0 — fixed in 4.0

How to fix

Upgrade to a fixed version: Siemens S7-1200 Cpu Firmware 4.5.0; Siemens S7-1500 Cpu Firmware 2.9.2; Siemens Simatic Driver Controller Firmware 2.9.2; Siemens SIMATIC S7-PLCSIM Advanced 4.0. Check the vendor advisory for mitigations.

References

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