CVE-2019-19281

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-03-10 · updated 2026-06-17
Weakness: CWE-400

Description

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.

Affected products

Siemens Simatic Et 200Sp Open Controller Cpu 1515Sp Pc2 Firmware: from 2.5 before 20.8 — fixed in 20.8
Siemens Simatic S7-1500 Cpu 1507S F Firmware: from 2.5 before 20.8 — fixed in 20.8
Siemens Simatic S7-1500 Cpu 1507S Firmware: from 2.5 before 20.8 — fixed in 20.8
Siemens Simatic S7-1500 Cpu 1508S F Firmware: from 2.5 before 20.8 — fixed in 20.8
Siemens Simatic S7-1500 Cpu 1508S Firmware: from 2.5 before 20.8 — fixed in 20.8
Siemens Simatic S7-1500 Cpu 1511-1 Pn Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1513-1 Pn Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1515-2 Pn Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1516-3 Dp Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1516-3 Pn Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1517-3 Dp Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1517-3 Pn Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1518-4 Dp Firmware: from 2.5 before 2.8 — fixed in 2.8
Siemens Simatic S7-1500 Cpu 1518-4 Pn Firmware: from 2.5 before 2.8 — fixed in 2.8

How to fix

Upgrade to a fixed version: Siemens Simatic Et 200Sp Open Controller Cpu 1515Sp Pc2 Firmware 20.8; Siemens Simatic S7-1500 Cpu 1507S F Firmware 20.8; Siemens Simatic S7-1500 Cpu 1507S Firmware 20.8; Siemens Simatic S7-1500 Cpu 1508S F Firmware 20.8; Siemens Simatic S7-1500 Cpu 1508S Firmware 20.8; Siemens Simatic S7-1500 Cpu 1511-1 Pn Firmware 2.8; Siemens Simatic S7-1500 Cpu 1513-1 Pn Firmware 2.8; Siemens Simatic S7-1500 Cpu 1515-2 Pn Firmware 2.8; Siemens Simatic S7-1500 Cpu 1516-3 Dp Firmware 2.8; Siemens Simatic S7-1500 Cpu 1516-3 Pn Firmware 2.8; Siemens Simatic S7-1500 Cpu 1517-3 Dp Firmware 2.8; Siemens Simatic S7-1500 Cpu 1517-3 Pn Firmware 2.8. Check the vendor advisory for mitigations.

References

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