CVE-2020-15783

HIGH
7.5
CVSS Score
Published: November 12, 2020 at 07:21 PM UTC
Updated: June 17, 2026 at 02:57 AM UTC
25 products affected across 1 vendorSIMATIC S7-300 CPU 315-2 Dp FirmwareSIMATIC Tdc CPU555 FirmwareSIMATIC S7-300 CPU 317-2 Dp Firmware

Using SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) by Siemens?

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.

Affected

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

All versions
siemens-simatic-s7-300-cpu-312 (same device)
All versions
siemens-simatic-s7-300-cpu-315-2-dp (same device)
All versions
siemens-simatic-s7-300-cpu-315-2-pn (same device)
All versions
siemens-simatic-s7-300-cpu-315f-2-pn (same device)
All versions
siemens-simatic-s7-300-cpu-317-2-pn (same device)
All versions
siemens-simatic-s7-300-cpu-317f-2-dp (same device)
All versions
siemens-simatic-s7-300-cpu-317f-2-pn (same device)

Remediation

No guide yet

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

References (1)

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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