CVE-2015-1356

mediumpriority · track · 18EPSS 0.005 · 43 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.51% (43rd) EPSS

CVSS 4.4 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

Siemens SIMATIC STEP 7 (TIA Portal) before 13 SP1 determines a user's privileges on the basis of project-file fields that lack integrity protection, which allows remote attackers to establish arbitrary authorization data via a modified file.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationSIMATIC STEP 7 TIA Portalcisa_csaf_ot
For more information on these vulnerabilities and detailed instructions, please see Siemens Security Advisory SSA-234789 at the following location: http://www.siemens.com/cert/advisories

cvss

Technical severity, 0–10. One row per scoring source.

4.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.6–4.4

v2.04.4mediumAV:L/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.4 · impact 6.4

v2.02.6lowAV:L/AC:H/Au:N/C:P/I:P/A:Nsecondary · CISA US

v2.03.7lowAV:L/AC:M/Au:N/C:P/I:P/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USprimaryCWE-305US

affected products (4)

Products and version ranges known to be affected.

Siemens SIMATIC STEP 7 TIA Portal: <V13_SP1all versionscisa_csaf_otUS
Siemens SIMATIC STEP 7 TIA Portal< V13_SP1cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
siemens simatic step 7≤ 13.0nvdUScpe:2.3:a:siemens:simatic_step_7:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-15-048-01Siemens SIMATIC STEP 7 TIA Portal Vulnerabilities2015-11-20icsa · cisa_csaf_otUS
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2015-02-18modified 2026-06-17

related (8,955)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2024-26169US	—OT critical	3.98% (90th)	KEV	2024-03-12
Windows Error Reporting Service Elevation of Privilege Vulnerability
CVE-2024-21338US	—OT critical	59.8% (99th)	KEV	2024-02-13
Windows Kernel Elevation of Privilege Vulnerability
CVE-2023-43208US	critical9.8OT critical	85.4% (100th)	KEV	2023-10-26
NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution. Note that this vulnerability is caused by the incomplete patch of CVE-…
CVE-2023-29357US	—OT critical	100.0% (100th)	KEV	2023-06-14
Microsoft SharePoint Server Elevation of Privilege Vulnerability
CVE-2023-20963US	high7.8OT critical	1.47% (74th)	KEV	2023-03-24
In WorkSource, there is a possible parcel mismatch. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed…

+8950 more

references (3)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan