CVE-2025-27127

mediumpriority · track · 0EPSS 0.003 · 25 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.33% (25th) EPSS

CVSS 4.3 · medium

Is it mine?

33 products

Check your exposure

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A vulnerability has been identified in TIA Project-Server (All versions < V2.1.1), TIA Project-Server V17 (All versions), Totally Integrated Automation Portal (TIA Portal) V17 (All versions), Totally Integrated Automation Portal (TIA Portal) V18 (All versions), Totally Integrated Automation Portal (TIA Portal) V19 (All versions < V19 Update 4), Totally Integrated Automation Portal (TIA Portal) V20 (All versions < V20 Update 3). The affected application improperly handles uploaded projects in the document root. This could allow an attacker with contributor privileges to cause denial of service by uploading a malicious project.

remediations

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

A vendor fix is available.

FixedTIA Project-Serversiemens_psirt
Update to V2.1.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109810588/
FixedTotally Integrated Automation Portal (TIA Portal) V19siemens_psirt
Update to V19 Update 4 or later version
https://support.industry.siemens.com/cs/ww/en/view/109925643/
FixedTotally Integrated Automation Portal (TIA Portal) V20siemens_psirt
Update to V20 Update 3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109963851/
FixedTIA Project-Servercisa_csaf_ot
Update to V2.1.1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109810588/
FixedTotally Integrated Automation Portal (TIA Portal) V19cisa_csaf_ot
Update to V19 Update 4 or later version
https://support.industry.siemens.com/cs/ww/en/view/109925643/
FixedTotally Integrated Automation Portal (TIA Portal) V20cisa_csaf_ot
Update to V20 Update 3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109963851/
No fix plannedTIA Project-Server V17siemens_psirt
Currently no fix is planned
No fix plannedTotally Integrated Automation Portal (TIA Portal) V17siemens_psirt
Currently no fix is planned
No fix plannedTotally Integrated Automation Portal (TIA Portal) V18siemens_psirt
Currently no fix is planned
No fix plannedTIA Project-Server V17cisa_csaf_ot
Currently no fix is planned
No fix plannedTotally Integrated Automation Portal (TIA Portal) V17cisa_csaf_ot
Currently no fix is planned
No fix plannedTotally Integrated Automation Portal (TIA Portal) V18cisa_csaf_ot
Currently no fix is planned

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 · 1.3–5.3

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · productcert@siemens.com DEexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.14.3mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:Csecondary · CISA US

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · productcert@siemens.com DE

v4.05.3mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.01.3lowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-434USCWE-434USCWE-434USCWE-434USCWE-434US

affected products (33)

Products and version ranges known to be affected.

Siemens TIA Portal <V20 Update 3all versionscert_bundDE
Siemens TIA Portal< V20 Update 3cert_bundDE
TIA Project-Serverall versionscisa_csaf_otUS
TIA Project-Server V17all versionscisa_csaf_otUS
Totally Integrated Automation Portal (TIA Portal) V17all versionscisa_csaf_otUS
Totally Integrated Automation Portal (TIA Portal) V18all versionscisa_csaf_otUS
Totally Integrated Automation Portal (TIA Portal) V19all versionscisa_csaf_otUS
Totally Integrated Automation Portal (TIA Portal) V20all versionscisa_csaf_otUS
Siemens TIA Project-Server≤ vers:intdot/<2.1.1cisa_csaf_otUS
Siemens TIA Project-Server V17≤ vers:all/*cisa_csaf_otUS
Siemens Totally Integrated Automation Portal (TIA Portal) V17≤ vers:all/*cisa_csaf_otUS
Siemens Totally Integrated Automation Portal (TIA Portal) V18≤ vers:all/*cisa_csaf_otUS
Siemens Totally Integrated Automation Portal (TIA Portal) V19< V19_Update_4cisa_csaf_otUS
Siemens Totally Integrated Automation Portal (TIA Portal) V20< V20_Update_3cisa_csaf_otUS
Siemens TIA Project-Server0 → V2.1.1enisa_euvdEU
Siemens TIA Project-Server V170 → *enisa_euvdEU
Siemens Totally Integrated Automation Portal (TIA Portal) V170 → *enisa_euvdEU
Siemens Totally Integrated Automation Portal (TIA Portal) V180 → *enisa_euvdEU
Siemens Totally Integrated Automation Portal (TIA Portal) V190 → *enisa_euvdEU
Siemens Totally Integrated Automation Portal (TIA Portal) V190 → V19 Update 4enisa_euvdEU

showing 20 of 33

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2025-0211Kwetsbaarheden verholpen in Siemens productenNL2025-07-08csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als SIMATIC, SINEC, SIPROTEC, Solid Edge en TIA,
SSA-460466SSA-460466: Denial of Service Vulnerability in TIA Project-Server and TIA Portal2025-07-08csaf · siemens_psirtDE
A vulnerability in TIA Project Server and TIA Portal could allow an attacker to cause a denial of service condition. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends countermeasures for products where fixes are not, or not yet available.
WID-SEC-W-2025-1477Siemens TIA Portal: Schwachstelle ermöglicht Denial of ServiceDeutsch2025-07-07csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Siemens TIA Portal ausnutzen, um einen Denial of Service Angriff durchzuführen.
ICSA-25-191-05Siemens TIA Project-Server and TIA Portal2025-07-08icsa · cisa_csaf_otUS
A vulnerability in TIA Project Server and TIA Portal could allow an attacker to cause a denial of service condition. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends countermeasures for products where fixes are not, or not yet available.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund cisa_csaf_ot ncsc_nl siemens_psirt NVD CVE.org MITRE

published 2025-07-08modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

scry

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