CVE-2021-33716

MEDIUM
6.5
CVSS Score
Published: September 14, 2021 at 10:47 AM UTC
Updated: June 17, 2026 at 03:55 AM UTC
4 products affected across 1 vendorSIMATIC Cp 1543-1 FirmwareSIMATIC Cp 1545-1 FirmwareSimatic Cp 1545-1

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%

Description

A vulnerability has been identified in SIMATIC CP 1543-1 (incl. SIPLUS variants) (All versions < V3.0), SIMATIC CP 1545-1 (All versions < V1.1). An attacker with access to the subnet of the affected device could retrieve sensitive information stored in cleartext.

Affected

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

v < 3.0
Affected range stops below 3.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-cp-1543-1 (same device)
Affected range stops below 1.1, so it looks safe — our inference, not a vendor statement
siemens-simatic-cp-1545-1 (same device)
All versions

Remediation

No guide yet

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

References (1)

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-312

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