CVE-2016-7959

lowpriority · track · 19EPSS 0.003 · 22 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.30% (22nd) EPSS

CVSS 1.9 · low

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

Siemens SIMATIC STEP 7 (TIA Portal) before 14 improperly stores pre-shared key data in TIA project files, which makes it easier for local users to obtain sensitive information by leveraging access to a file and conducting a brute-force attack.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationSIMATIC STEP 7 (TIA Portal)cisa_csaf_ot
Access to the TIA Portal project files on engineering workstations or network storage must be protected with appropriate mechanisms from unauthorized access.

cvss

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

4.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.9–4.7

v2.01.9lowAV:L/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.4 · impact 2.9

v3.04.7mediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 1 · impact 3.6

v2.01.9lowAV:L/AC:M/Au:N/C:P/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.02.5lowCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:Nsecondary · CISA US

v3.04.3mediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-254USprimaryCWE-254USCWE-326US

affected products (5)

Products and version ranges known to be affected.

Siemens SIMATIC STEP 7 (TIA Portal): <V14all versionscisa_csaf_otUS
Siemens SIMATIC STEP 7 (TIA Portal)< V14cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
Siemens AG Siemens SIMATIC STEP 7 (TIA Portal)≤ 13fstec_bduRU
siemens simatic step 7≤ 13.010nvdUScpe:2.3:a:siemens:simatic_step_7:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-16-287-03Siemens SIMATIC STEP 7 (TIA Portal) Information Disclosure Vulnerabilities2016-07-17icsa · 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 (8)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot nvd NVD CVE.org MITRE

published 2016-10-13modified 2026-06-17

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+795 more

references (7)

External citations — patches, advisories, analysis.

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