CVE-2026-76800Network attack vector

Authenticated file upload via uploadfile parameter

Published Aug 20, 2026 · Updated Aug 20, 2026

Unrestricted upload in /include/dialog/select_media_post.php in DedeCMS 3 allows remote authenticated users to upload files via uploadfile. Public records identify the endpoint and parameter but do not disclose which validation or authorization check on uploadfile is missing, only that the handler accepts an attacker-supplied file without effective restriction. Exploitation requires low-privileged authenticated network access per the published CVSS vector, and the disclosed impact is unauthorized file write with resulting confidentiality, integrity, and availability exposure.

CVSS severity6.3
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted upload in /include/dialog/select_media_post.php in DedeCMS 3 allows remote authenticated users to upload files via uploadfile. Public records identify the endpoint and parameter but do not disclose which validation or authorization check on uploadfile is missing, only that the handler accepts an attacker-supplied file without effective restriction. Exploitation requires low-privileged authenticated network access per the published CVSS vector, and the disclosed impact is unauthorized file write with resulting confidentiality, integrity, and availability exposure.

The record

CVE
CVE-2026-76800
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Shanghai Zhuozhuo Network Technology Co., Ltd. (DesDev)
Product
DedeCMS
Classifications
CWE-434, CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shanghai Zhuozhuo Network Technology Co., Ltd. (DesDev) · DedeCMSversion=3

Published CVSS scores

6.3[email protected]CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5[email protected]AV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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