Is CVE-2020-15782 in the CISA KEV catalog?

No. CVE-2020-15782 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-15782?

CVE-2020-15782 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2020-15782?

CVE-2020-15782 has an EPSS score of 5.18% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-15782?

Upgrade s7-1200 cpu firmware to 4.5.0 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2020-15782

CRITICALEPSS 91th pctl

9.8

CVSS v3

NVD

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.

CWE-119Buffer Overflow

How to fix

Remediation Available

s7-1200 cpu firmwareNVD

Affected:< 4.5.0Fixed in:4.5.0CVE-2020-15782derived from NVD

s7-1500 cpu firmwareNVD

Affected:< 2.9.2Fixed in:2.9.2CVE-2020-15782derived from NVD

simatic driver controller firmwareNVD

Affected:< 2.9.2Fixed in:2.9.2CVE-2020-15782derived from NVD

simatic s7-plcsim advancedNVD

Affected:< 4.0Fixed in:4.0CVE-2020-15782derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

5.18%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch1

cert-portal.siemens.com

Other references2

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-02.