CVE-2016-2201

mediumpriority · track · 22EPSS 0.029 · 87 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.92% (87th) EPSS

CVSS 5 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-23

Siemens SIMATIC S7-1500 CPU devices before 1.8.3 allow remote attackers to bypass a replay protection mechanism via packets on TCP port 102.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationSIMATIC S7-1500 CPU familycisa_csaf_ot
Siemens has released SIMATIC S7-1500 firmware Version 1.8.3, which addresses the identified vulnerabilities and recommends that users update to the new firmware version, which is available at the following URL (https://support.industry.siemens.com/cs/de/en/view/109478459)
https://support.industry.siemens.com/cs/de/en/view/109478459

cvss

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

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–5.3

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.03.7lowCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · CISA US

v3.04.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-340US

affected products (4)

Products and version ranges known to be affected.

Siemens SIMATIC S7-1500 CPU family: <1.8.3all versionscisa_csaf_otUS
Siemens SIMATIC S7-1500 CPU family< 1.8.3cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
siemens simatic s7-1500 cpu firmware= 1.8.2nvdUScpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-16-040-02Siemens SIMATIC S7-1500 CPU Vulnerabilities2016-11-12icsa · 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 2016-02-08modified 2026-06-17

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references (15)

External citations — patches, advisories, analysis.

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