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Fencer Vulns
critical 9.8

CVE-2020-15782 json

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP…

published 2021-05-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-7765

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
5.2%
EPSS 5.2% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

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.

Patch / fix

  • siemens simatic_s7-plcsim_advanced 4.0
  • siemens simatic_driver_controller_firmware 2.9.2
  • siemens s7-1200_cpu_firmware 4.5.0
  • siemens s7-1500_cpu_firmware 2.9.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-152-01 updated cvss 8.1

Siemens SIMATIC S7-1200 and S7-1500 CPU Families (Update A)

  • Siemens SIMATIC Drive Controller family <V2.9.2
    affected: fixed in V2.9.2, mitigation support.industry.siemens.com
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)
    affected: mitigation, no fix available
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) <V21.9
    affected: fixed in V21.9, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants) <V4.5.0
    affected: fixed in V4.5.0, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) <V2.9.2
    affected: fixed in V2.9.2, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-1500 Software Controller <V21.9
    affected: fixed in V21.9, mitigation support.industry.siemens.com
  • Siemens SIMATIC S7-PLCSIM Advanced <V4.0
    affected: fixed in V4.0, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-21-194-17 updated cvss 8.1

Siemens SINUMERIK ONE and SINUMERIK MC (Update A)

  • Siemens SINUMERIK MC <V6.15 Siemens SINUMERIK ONE <V6.15
    affected: fixed in V6.15, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-182-01 updated cvss 9.8

FESTO Didactic CP, MPS 200, and MPS 400 Firmware

  • FESTO Didactic CP including S7 PLC Firmware Siemens Simatic S7-1500 / ET200SP <V2.9.2 FESTO Didactic MPS 200 Systems Firmware Siemens Simatic S7-1500 / ET200SP <V2.9.2 FESTO Didactic MPS 400 Systems Firmware Siemens Simatic S7-1500 / ET200SP <V2.9.2
    affected: vendor fix support.industry.siemens.com
  • FESTO Didactic CP including S7 PLC Firmware Siemens Simatic S7-1500 / ET200SP V2.9.2 FESTO Didactic MPS 200 Systems Firmware Siemens Simatic S7-1500 / ET200SP V2.9.2 FESTO Didactic MPS 400 Systems Firmware Siemens Simatic S7-1500 / ET200SP V2.9.2
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-21-194-13 updated cvss 8.1

Siemens SINAMICS PERFECT HARMONY GH180 (Update A)

  • Siemens SINAMICS PERFECT HARMONY GH180 Drives < 2021-8-13 Siemens SINAMICS PERFECT HARMONY model 6SR4 W41 with X30 air - air hex Siemens SINAMICS PERFECT HARMONY model 6SR5 A84, A85 E06 W41 with X30 air - air hex
    affected: vendor fix cert-portal.siemens.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
5 mo ago

Exploit prediction

5.18% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Siemens SIMATIC Drive Controller family
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)
  • Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
  • Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants)
  • Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)
  • Siemens SIMATIC S7-1500 Software Controller
  • Siemens SIMATIC S7-PLCSIM Advanced
  • Siemens SINAMICS PERFECT HARMONY GH180 Drives
  • Siemens SINUMERIK MC
  • Siemens SINUMERIK ONE

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.