CVE-2012-3040

What it is

Cross-site scripting (XSS) vulnerability in the web server on Siemens SIMATIC S7-1200 PLCs 2.x through 3.0.1 allows remote attackers to inject arbitrary web script or HTML via a crafted URI.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.6% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2012-10-10 18:55 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: 2.6% in the next 30 days (EPSS).
• Severity: 4.3 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2012-10-10 18:55 UTC

Last modified

2026-06-16 23:42 UTC

Exploit probability

2.6% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Modified

Affected

• Siemens Simatic s7-1200 Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1211c Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1212c Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1212fc Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1214 Fc Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1214c Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1215 Fc Firmware < 3.0.2
• Siemens Simatic s7-1200 Cpu 1215c Firmware < 3.0.2

Attack profile CVSS 2.0 · 4.3

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

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