CVE-2026-25789

HIGHCVSS 7.2/10EPSS 0.27%

Last modified

CVE-2026-25789 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.

Metrics

CVSS 3.1
7.1/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS 4.0
7.2/10

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:H/VA:H/SC:L/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

EPSS Probability
0.27%

19.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
SiemensSIMATIC Drive Controller CPU 1504D TF< V3.1.6
SiemensSIMATIC Drive Controller CPU 1507D TF< V3.1.6
SiemensSIMATIC ET 200SP CPU 1510SP F-1 PN< *
SiemensSIMATIC ET 200SP CPU 1510SP F-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1510SP F-1 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1510SP-1 PN< *
SiemensSIMATIC ET 200SP CPU 1510SP-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1510SP-1 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1512SP F-1 PN< *
SiemensSIMATIC ET 200SP CPU 1512SP F-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1512SP F-1 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1512SP-1 PN< *
SiemensSIMATIC ET 200SP CPU 1512SP-1 PN< V2.9.9
SiemensSIMATIC ET 200SP CPU 1512SP-1 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1514SP F-2 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1514SP-2 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1514SPT F-2 PN< V4.1.6
SiemensSIMATIC ET 200SP CPU 1514SPT-2 PN< V4.1.6
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants)< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs< *
SiemensSIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs< *
SiemensSIMATIC S7-1500 CPU 1511-1 PN< *
SiemensSIMATIC S7-1500 CPU 1511-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1511C-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511C-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1511F-1 PN< *
SiemensSIMATIC S7-1500 CPU 1511F-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511F-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1511T-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511T-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1511TF-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1511TF-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1512C-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1512C-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1513-1 PN< *
SiemensSIMATIC S7-1500 CPU 1513-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1513-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1513F-1 PN< *
SiemensSIMATIC S7-1500 CPU 1513F-1 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1513F-1 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1513pro F-2 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1513pro-2 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1515-2 PN< *
SiemensSIMATIC S7-1500 CPU 1515-2 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1515-2 PN< V4.1.6
SiemensSIMATIC S7-1500 CPU 1515F-2 PN< *
SiemensSIMATIC S7-1500 CPU 1515F-2 PN< V2.9.9
SiemensSIMATIC S7-1500 CPU 1515F-2 PN< V4.1.6

Showing 50 of 139 affected configurations. See the CNA advisory for the full list.

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-25789?
Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.
How severe is CVE-2026-25789?
CVE-2026-25789 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.
How do I fix CVE-2026-25789?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST