Siemens SIMATIC S7-1200 Improper Input Validation (CVE-2014-2256)

high Tenable OT Security Plugin ID 500263


The remote OT asset is affected by a vulnerability.


Siemens SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted ISO-TSAP packets, a different vulnerability than CVE-2014-2257.

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Refer to the vendor advisory.

See Also

Plugin Details

Severity: High

ID: 500263

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 12/14/2023

Supported Sensors: Tenable OT Security

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2014-2256


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:simatic_s7_cpu_1200_firmware, cpe:/o:siemens:simatic_s7_cpu_1200_firmware:3.0

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 3/24/2014

Vulnerability Publication Date: 3/24/2014

Reference Information

CVE: CVE-2014-2256

CWE: 399