CVE-2019-19281

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

1.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2020-03-10 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:26 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.7% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2020-03-10 20:15 UTC

Last modified

2026-06-17 02:26 UTC

Exploit probability

1.7% · EPSS, next 30 days

Weakness

CWE-400 · Uncontrolled resource consumption

Record status

Modified

Affected

• Siemens Simatic Et 200sp Open Controller Cpu 1515sp pc2 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 Pn Firmware < 2.8
• Siemens Simatic s7-1500 Cpu 1516-3 Dp Firmware < 2.8
• Siemens Simatic s7-1500 Cpu 1517-3 Pn Firmware < 2.8
• Siemens Simatic s7-1500 Cpu 1517-3 Dp Firmware < 2.8

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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