CVE-2012-3017

What it is

Siemens SIMATIC S7-400 PN CPU devices with firmware 5.x allow remote attackers to cause a denial of service (defect-mode transition and service outage) via (1) malformed HTTP traffic or (2) malformed IP packets.

At a glance

Exploitability

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

Exploit odds

3.5% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2012-07-31 10:45 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:42 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.5% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2012-07-31 10:45 UTC

Last modified

2026-06-16 23:42 UTC

Exploit probability

3.5% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Siemens Simatic s7-400 Cpu Firmware 5.0
• Siemens Simatic s7-400 Cpu 414-3 pn\/dp
• Siemens Simatic s7-400 Cpu 416-3 pn\/dp
• Siemens Simatic s7-400 Cpu 416f-3 pn\/dp

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

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