Affected devices do not properly validate and sanitize PLC/station name rendered on the "communication" parameters page of the web interfac…

published 2026-05-12 5 mo ago modified 2026-07-14 3 mo ago also EUVD-2026-29426

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits: 0; none known

Affected devices do not properly validate and sanitize PLC/station name rendered on the "communication" parameters page of the web interface. This could allow an authenticated attacker who is authorized to download a TIA project into the product, to inject malicious scripts into the page. If a benign user with appropriate rights accesses the "communication" parameters page, the malicious code would be executed in the scope of their web session.

Patch / fix

fixed in 30

Siemens SIMATIC Drive Controller CPU 1504D TF V3.1.6
Siemens SIMATIC Drive Controller CPU 1507D TF V3.1.6
Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN V2.9.9, V4.1.6
Siemens SIMATIC ET 200SP CPU 1510SP-1 PN V2.9.9, V4.1.6
Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN V2.9.9, V4.1.6
Siemens SIMATIC ET 200SP CPU 1512SP-1 PN V2.9.9, V4.1.6
Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN V4.1.6
Siemens SIMATIC ET 200SP CPU 1514SP-2 PN V4.1.6
Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN V4.1.6
Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN V4.1.6
Siemens SIMATIC S7-1500 CPU 1511-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1511C-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1511F-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1511T-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1511TF-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1512C-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1513-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1513F-1 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1513pro F-2 PN V4.1.6
Siemens SIMATIC S7-1500 CPU 1513pro-2 PN V4.1.6
Siemens SIMATIC S7-1500 CPU 1515-2 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1515F-2 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1515T-2 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1515TF-2 PN V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP V2.9.9, V4.1.6
Siemens SIMATIC S7-1500 CPU 1516pro F-2 PN V4.1.6
Siemens SIMATIC S7-1500 CPU 1516pro-2 PN V4.1.6
Siemens SIMATIC S7-1500 CPU 1516T-3 PN V4.1.6
Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP V3.1.6

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-134-15 updated 2026-05-14 cvss 9.1

Siemens SIMATIC S7 PLC Web Server

Siemens SIMATIC Drive Controller CPU 1504D TF (6ES7615-4DF10-0AB0) < 3.1.6 Siemens SIMATIC Drive Controller CPU 1507D TF (6ES7615-7DF10-0AB0) < 3.1.6
affected: fixed in V3.1.6, mitigation support.industry.siemens.com
Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SJ00-0AB0)
affected: mitigation, no fix planned
Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SJ01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SK03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DJ00-0AB0)
affected: mitigation, no fix planned
Siemens SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DJ01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DK03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SK00-0AB0)
affected: mitigation, no fix planned

show 19 more

Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SK01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SM03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DK00-0AB0)
affected: mitigation, no fix planned
Siemens SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DK01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DM03-0AB0) Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN (6ES7514-2SN03-0AB0) Siemens SIMATIC ET 200SP CPU 1514SP-2 PN (6ES7514-2DN03-0AB0) Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN (6ES7514-2WN03-0AB0) Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN (6ES7514-2VN03-0AB0) Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)

+3 more productsfewer

Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs

affected: mitigation, no fix available
Siemens SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK00-0AB0)
affected: mitigation, no fix planned
Siemens SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK01-0AB0) < 2.9.9 Siemens SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK02-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AL03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK00-0AB0) < 2.9.9 Siemens SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CL03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK00-0AB0)
affected: mitigation, no fix planned
Siemens SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK01-0AB0) < 2.9.9 Siemens SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK02-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FL03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TK01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TL03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC S7-1500 CPU 1511TF-1 PN (6ES7511-1UK01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC S7-1500 CPU 1511TF-1 PN (6ES7511-1UL03-0AB0)
affected: mitigation, no fix available
Siemens SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CK00-0AB0) < 2.9.9 Siemens SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CK01-0AB0) < 2.9.9
affected: fixed in V2.9.9, mitigation support.industry.siemens.com
Siemens SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CM03-0AB0)
affected: mitigation, no fix available

135 more affected in the full advisory

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 5 mo ago (2026-05-12)

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:X

Affected products

Siemens SIMATIC Drive Controller CPU 1504D TF
Siemens SIMATIC Drive Controller CPU 1507D TF
Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN
Siemens SIMATIC ET 200SP CPU 1510SP-1 PN
Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN
Siemens SIMATIC ET 200SP CPU 1512SP-1 PN
Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN
Siemens SIMATIC ET 200SP CPU 1514SP-2 PN
Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN
Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs
Siemens SIMATIC S7-1500 CPU 1511-1 PN
Siemens SIMATIC S7-1500 CPU 1511C-1 PN
Siemens SIMATIC S7-1500 CPU 1511F-1 PN
Siemens SIMATIC S7-1500 CPU 1511T-1 PN
Siemens SIMATIC S7-1500 CPU 1511TF-1 PN
Siemens SIMATIC S7-1500 CPU 1512C-1 PN
Siemens SIMATIC S7-1500 CPU 1513-1 PN
Siemens SIMATIC S7-1500 CPU 1513F-1 PN
Siemens SIMATIC S7-1500 CPU 1513pro F-2 PN
Siemens SIMATIC S7-1500 CPU 1513pro-2 PN
Siemens SIMATIC S7-1500 CPU 1515-2 PN
Siemens SIMATIC S7-1500 CPU 1515F-2 PN
Siemens SIMATIC S7-1500 CPU 1515T-2 PN
Siemens SIMATIC S7-1500 CPU 1515TF-2 PN
Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1516pro F-2 PN
Siemens SIMATIC S7-1500 CPU 1516pro-2 PN
Siemens SIMATIC S7-1500 CPU 1516T-3 PN
Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1516TF-3 PN
Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1517-3 PN
Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1517F-3 PN
Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1517T-3 PN
Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1517TF-3 PN
Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP
Siemens SIMATIC S7-1500 CPU 1518-3 PN
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
Siemens SIMATIC S7-1500 CPU 1518F-3 PN
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

cert-portal.siemens.com /productcert/html/ssa-688146.html

Sources

CVE List CVE-2026-25786
NVD CVE-2026-25786

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary