CVE-2016-8673

mediumpriority · track · 35OT risk · elevatedEPSS 0.011 · 66 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.11% (66th) EPSS

CVSS 6.8 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · siemens_psirt

EPSS · scored 2026-10-27

A vulnerability has been identified in SIMATIC CP 343-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.0.53), SIMATIC CP 443-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.2.17), SIMATIC S7-300 PN/DP CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants) (All versions). The integrated web server at port 80/TCP or port 443/TCP of the affected devices could allow remote attackers to perform actions with the permissions of an authenticated user, provided the targeted user has an active session and is induced to trigger the malicious request.

remediations

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

A vendor fix is available.

FixedSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)siemens_psirt
Update to V3.0.53 or any later version
https://support.industry.siemens.com/cs/ww/en/view/109742236
FixedSIMATIC CP 443-1 Advanced (incl. SIPLUS variants)siemens_psirt
Update to V3.2.17 or any later version
https://support.industry.siemens.com/cs/ww/en/view/109745388
FixedSIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)siemens_psirt
Update to V3.X.18 or later version
https://support.industry.siemens.com/cs/ww/en/ps/13752/dl
WorkaroundSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
WorkaroundSIMATIC CP 443-1 Advanced (incl. SIPLUS variants)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
WorkaroundSIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
WorkaroundSIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants)siemens_psirt
Deactivate the webserver if not required, and if deactivation is supported by the product
No fix plannedSIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants)siemens_psirt
Currently no fix is planned

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.3–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.08.8highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.08.1highCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-352USprimaryCWE-345US

affected products (9)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
siemens simatic cp 343-1 firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_cp_343-1_firmware:*:*:*:*:*:*:*:*
siemens simatic cp 443-1 firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_cp_443-1_firmware:*:*:*:*:*:*:*:*
siemens simatic s7 300 cpu firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_s7_300_cpu_firmware:*:*:*:*:*:*:*:*
siemens simatic s7 400 cpu firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_s7_400_cpu_firmware:*:*:*:*:*:*:*:*
Siemens SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)≤ vers:all/<V3.0.53siemens_psirtDE
Siemens SIMATIC CP 443-1 Advanced (incl. SIPLUS variants)≤ vers:all/<V3.2.17siemens_psirtDE
Siemens SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)≤ vers:all/<V3.X.18siemens_psirtDE
Siemens SIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants)≤ vers:all/*siemens_psirtDE

advisories (1)

Vendor and ecosystem advisories describing this.

SSA-603476SSA-603476: Web Vulnerabilities in SIMATIC NET CP 343-1/CP 443-1 Modules and SIMATIC S7-300/S7-400 CPUs2016-11-21csaf · siemens_psirtDE
SIMATIC CP 343-1 Advanced/CP-443-1 Advanced devices and SIMATIC S7-300/S7-400 CPUs are affected by two vulnerabilities. One of the vulnerabilities could allow remote attackers to perform operations as an authenticated user under certain conditions. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd siemens_psirt NVD CVE.org MITRE

published 2016-11-23modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

scry

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