CVE-2014-2256: n/a vulnerability

CVE-2014-2256: Siemens SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 allow remote attackers to cause a denial o...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 10:06 UTC (UTC+00:00)

Security readout for executives and security teams

This issue affects Siemens SIMATIC S7-1200 CPU PLCs running firmware before 4.0. A remote attacker could send crafted ISO-TSAP network traffic that forces the PLC into a defect-mode denial of service. For industrial environments, the key risk is process disruption rather than data theft. Exposure is most relevant where SIMATIC S7-1200 PLCs with firmware below 4.0 are reachable over networks that allow ISO-TSAP traffic. Internet exposure would raise urgency, but the bundle does not confirm any exposed deployments. Treat as a targeted OT availability risk. It should be prioritized where affected PLCs support production, safety-adjacent, or high-availability operations, especially if reachable beyond tightly controlled industrial networks. Mitigation focus: Identify any SIMATIC S7-1200 CPU devices running firmware below 4.0.; Review Siemens ProductCERT advisory SSA-654382 for applicable firmware guidance.; Upgrade affected PLC firmware if Siemens guidance confirms 4.0 or later is supported..

Prepared: Jun 14, 2026, 14:32 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 22, 2014, 01:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://cert-portal.siemens.com/productcert/pdf/ssa-654382.pdfCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

No CWE listed

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