CVE-2026-50768Public exploitNetwork attack vector

Stored cross-site scripting via unrestricted attachment upload

Published Aug 17, 2026 · Updated Aug 17, 2026

Unrestricted file upload in T-Systems ImageMaster 9.14.2.8.1 allows remote authenticated users to run browser script via attachments. The create-new-document attachment handler accepts dangerous extensions without checking file type, content, or size, then serves uploaded HTML so its script executes when opened. An account and a viewer opening the stored attachment are required; the published proof demonstrates stored cross-site scripting, not server-side arbitrary code execution.

CVSS severity8.8
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unrestricted file upload in T-Systems ImageMaster 9.14.2.8.1 allows remote authenticated users to run browser script via attachments. The create-new-document attachment handler accepts dangerous extensions without checking file type, content, or size, then serves uploaded HTML so its script executes when opened. An account and a viewer opening the stored attachment are required; the published proof demonstrates stored cross-site scripting, not server-side arbitrary code execution.

The record

CVE
CVE-2026-50768
Published
Aug 17, 2026
Updated
Aug 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1203Exploitation for Client Execution

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo