CVE-2026-9157

Local code inclusion via dangerous file upload

Published May 21, 2026 · Updated May 21, 2026

Unrestricted file upload in Gmission Web Fax 3.0 allows local users to include remote code through a dangerous file type. FSI and Gmission have not disclosed the upload handler, request field, validation failure, or code-inclusion path beyond identifying improper input validation and acceptance of a dangerous file type. Reachability is local and requires no privileges or user interaction; successful inclusion runs attacker-controlled code in the application context.

CVSS severity8.6
High
EPSS probability0.12%
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 Gmission Web Fax 3.0 allows local users to include remote code through a dangerous file type. FSI and Gmission have not disclosed the upload handler, request field, validation failure, or code-inclusion path beyond identifying improper input validation and acceptance of a dangerous file type. Reachability is local and requires no privileges or user interaction; successful inclusion runs attacker-controlled code in the application context.

The record

CVE
CVE-2026-9157
Published
May 21, 2026
Updated
May 21, 2026
Vendor
Gmission
Product
Web Fax
Classifications
CWE-20, CWE-434
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 21, 2026CVE publishedPublication date reported by the CVE source.
  2. May 21, 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=3.0 <3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Gmission · Web Faxversion=3.0 <3.1

Published CVSS scores

8.4FSICVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6FSICVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-434Unrestricted Upload of File with Dangerous Type

Public exploit references

No public exploit references are available in this record.

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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