CVE-2026-1358Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted JSP upload

Published Feb 12, 2026 · Updated Feb 12, 2026

Unrestricted file upload in WF Steuerungstechnik airleader MASTER 6.381 and earlier allows remote attackers to execute code without authentication. The doit.jsp and update.jsp upload handlers accept attacker-supplied JSP files without authentication; one filename check accepts an image extension anywhere in the name. Uploaded files remain web-accessible and execute under the web server's highest operating-system privileges, granting full server control.

CVSS severity9.3
Critical
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in WF Steuerungstechnik airleader MASTER 6.381 and earlier allows remote attackers to execute code without authentication. The doit.jsp and update.jsp upload handlers accept attacker-supplied JSP files without authentication; one filename check accepts an image extension anywhere in the name. Uploaded files remain web-accessible and execute under the web server's highest operating-system privileges, granting full server control.

The record

CVE
CVE-2026-1358
Published
Feb 12, 2026
Updated
Feb 12, 2026
Vendor
WF Steuerungstechnik GmbH
Product
airleader MASTER
Classifications
CWE-434, T1190, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.381

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WF Steuerungstechnik GmbH · airleader MASTERversion=0 <=6.381

Published CVSS scores

9.3ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application
T1505.003Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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