CVE-2020-28397

MEDIUM
5.3
CVSS Score
Published: August 10, 2021 at 10:35 AM UTC
Updated: June 17, 2026 at 03:10 AM UTC
115 products affected across 1 vendorSIMATIC S7-1500 Software ControllerTim 1531 Irc FirmwareSIMATIC S7-plcsim Advanced Firmware

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.8%

Description

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7 PLCSIM Advanced (All versions > V2 < V4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (Version V4.4), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions > V2.5 < V2.9.2), SIMATIC S7-1500 Software Controller (All versions > V2.5 < V21.9), TIM 1531 IRC (incl. SIPLUS NET variants) (Version V2.1). Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

siemens-cpu-1211c (same device)
siemens-cpu-1212c (same device)
siemens-cpu-1212fc (same device)
siemens-cpu-1214c (same device)
siemens-cpu-1214fc (same device)
siemens-cpu-1215c (same device)
siemens-cpu-1215fc (same device)
siemens-cpu-1217c (same device)
v < 2.9.2
Affected range stops below 2.9.2, so it looks safe — our inference, not a vendor statement
siemens-cpu-1504d-tf (same device)
v < 2.9.2
Affected range stops below 2.9.2, so it looks safe — our inference, not a vendor statement
siemens-cpu-1507d-tf (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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