CVE-2026-25789
No known exploitation. EPSS puts it in the 38th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.5% chance of exploitation activity in the next 30 days, which ranks it in the 38th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
8 events over 63 days, from the signal feeds we watch.
- Patch availablerecord updated
- OpenVAS check added
- Patch availablepublished, weakness classified, att&ck mapped, record updated
Affected products
- SIMATIC Drive Controller CPU 1504D TFICS / OT / IoT
- SIMATIC Drive Controller CPU 1507D TFICS / OT / IoT
- SIMATIC ET 200SP CPU 1510SP F-1 PNICS / OT / IoT
- SIMATIC ET 200SP CPU 1510SP-1 PNICS / OT / IoT
- SIMATIC ET 200SP CPU 1512SP F-1 PNICS / OT / IoT
- SIMATIC ET 200SP CPU 1512SP-1 PNICS / OT / IoT
- SIMATIC ET 200SP CPU 1514SP F-2 PNICS / OT / IoT
- SIMATIC ET 200SP CPU 1514SP-2 PNICS / OT / IoT
And 94 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Scored 7.1 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required LowRequires basic user-level privileges
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
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