CVE-2019-19281: A vulnerability has been identified in SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V2.5 and < V20.8), SIM...

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.64%

73.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Simatic Et 200sp Open Controller Cpu 1515sp Pc2 Firmware	>= 2.5, < 20.8
Siemens	Simatic S7-1500 Cpu 1511-1 Pn Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1513-1 Pn Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1515-2 Pn Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1516-3 Pn Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1516-3 Dp Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1517-3 Pn Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1517-3 Dp Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1518-4 Pn Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1518-4 Dp Firmware	>= 2.5, < 2.8
Siemens	Simatic S7-1500 Cpu 1507s Firmware	>= 2.5, < 20.8
Siemens	Simatic S7-1500 Cpu 1508s Firmware	>= 2.5, < 20.8
Siemens	Simatic S7-1500 Cpu 1507s F Firmware	>= 2.5, < 20.8
Siemens	Simatic S7-1500 Cpu 1508s F Firmware	>= 2.5, < 20.8

References

Timeline

Published: Mar 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19281?

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.

How severe is CVE-2019-19281?

CVE-2019-19281 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19281?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.