CVE-2019-19281

highpriority · track · 31EPSS 0.017 · 77 %ileEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
1.68% (77th) EPSS
CVSS 7.8 · high
Is it mine?
26 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

A vulnerability has been identified in SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V2.5 and < V20.8), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.5 and < V2.8), SIMATIC S7-1500 Software Controller (All versions >= V2.5 and < V20.8). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a Denial-of-Service condition. The vulnerability can be triggered if specially crafted UDP packets are sent to the device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the device availability.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)cisa_csaf_ot

    Update to V20.8 (V2x.8 corresponds to V2.8 of the S7-1500 CPU firmware)

  • FixedSIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)cisa_csaf_ot

    Update to V2.8

  • FixedSIMATIC S7-1500 Software Controllercisa_csaf_ot

    Update to V20.8 (V2x.8 corresponds to V2.8 of the S7-1500 CPU firmware)

  • MitigationSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)cisa_csaf_ot

    Restrict network access to affected devices.

  • MitigationSIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants)cisa_csaf_ot

    Restrict network access to affected devices.

  • MitigationSIMATIC S7-1500 Software Controllercisa_csaf_ot

    Restrict network access to affected devices.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400USCWE-400US
04

affected products (26)

Products and version ranges known to be affected.

showing 20 of 26
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-20-042-11Siemens SIMATIC S7-1500 (Update A)2020-02-11icsa · cisa_csaf_otUS

    As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.

06

also known as (6)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otnvdNVDCVE.orgMITRE
published 2020-03-10modified 2026-06-17
09

references (7)

External citations — patches, advisories, analysis.

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