CVE-2026-1107Public exploitNetwork attack vector

Authenticated code execution via unrestricted file upload

Published Jan 18, 2026 · Updated Jan 18, 2026

Unrestricted file upload in EyouCMS 1.7.0, 1.7.1, and 5.0 allows remote authenticated users to upload files via viewfile. The Member Avatar Handler's check_userinfo function in Diyajax.php accepts a manipulated viewfile request-body value for the upload operation. Placement of a server-executable file can lead to code execution through file inclusion, although published sources do not identify the accepted file types or destination.

CVSS severity9.8
Critical
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Unrestricted file upload in EyouCMS 1.7.0, 1.7.1, and 5.0 allows remote authenticated users to upload files via viewfile. The Member Avatar Handler's check_userinfo function in Diyajax.php accepts a manipulated viewfile request-body value for the upload operation. Placement of a server-executable file can lead to code execution through file inclusion, although published sources do not identify the accepted file types or destination.

The record

CVE
CVE-2026-1107
Published
Jan 18, 2026
Updated
Jan 18, 2026
Vendor
Hainan Zanzan Network Technology Co., Ltd.
Product
EyouCMS
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 18, 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=1.7.0
  2. Affected versionversion=1.7.1
  3. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hainan Zanzan Network Technology Co., Ltd. · EyouCMSversion=1.7.0; version=1.7.1; version=5.0

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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