CVE-2026-66665Known exploitationNetwork attack vector

Backdoor execution via unauthenticated file upload

Published Aug 6, 2026 · Updated Aug 6, 2026

Unrestricted file upload in BrandExponents Type Hub 2.0.6 and earlier allows remote attackers to place dangerous files on WordPress sites. Neither the CNA record nor Patchstack identifies the receiving endpoint, vulnerable function, upload parameter, or missing validation operation. Unauthenticated network access is sufficient, and an uploaded backdoor can execute with the web server's privileges to provide further site access.

CVSS severity10.0
Critical
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in BrandExponents Type Hub 2.0.6 and earlier allows remote attackers to place dangerous files on WordPress sites. Neither the CNA record nor Patchstack identifies the receiving endpoint, vulnerable function, upload parameter, or missing validation operation. Unauthenticated network access is sufficient, and an uploaded backdoor can execute with the web server's privileges to provide further site access.

The record

CVE
CVE-2026-66665
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
BrandExponents
Product
Type Hub
Classifications
CWE-434, CAPEC-650, T1505.003, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=n/a <=2.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BrandExponents · Type Hubversion=n/a <=2.0.6

Published CVSS scores

10.0PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-650Upload a Web Shell to a Web Server
T1505.003Server Software Component: Web Shell
T1190Exploit Public-Facing Application

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.

Reported exploitation

Technologies

Your stack

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Your stack

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