Critical severity · published May 12, 2026
CVE-2026-25786
Affected devices do not properly validate and sanitize PLC/station name rendered on the "communication" parameters page of the web interface
9.1
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SD
SIMATIC Drive Controller CPU 1504D TF · Siemens
before V3.1.6 · source: vendor
SD
SIMATIC Drive Controller CPU 1507D TF · Siemens
before V3.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1510SP F-1 PN · Siemens
0; before V2.9.9; before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1510SP-1 PN · Siemens
0; before V2.9.9; before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1512SP F-1 PN · Siemens
0; before V2.9.9; before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1512SP-1 PN · Siemens
0; before V2.9.9; before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1514SP F-2 PN · Siemens
before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1514SP-2 PN · Siemens
before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1514SPT F-2 PN · Siemens
before V4.1.6 · source: vendor
SE
SIMATIC ET 200SP CPU 1514SPT-2 PN · Siemens
before V4.1.6 · source: vendor
SE
Affected product
SD
SIMATIC Drive Controller CPU 1504D TF
Siemens
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25786
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25786
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-688146.html
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