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Fencer Intel
high 7.1

CVE-2026-25789 json

Affected devices do not properly validate and sanitize filenames on the Firmware Update page.

published 5mo ago modified 3mo ago also EUVD-2026-29428

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

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.

Patch / fix

  • 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

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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 cvss 7.1

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 products
    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
5mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 7.2 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
CNA 4.0 7.2 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

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

Sources

Fencer Intel 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.