CVE-2026-28027Network attack vector

Unauthenticated local file inclusion and code execution

Published Mar 5, 2026 · Updated Mar 5, 2026

Local file inclusion in ThemeREX Kayon 1.3 and earlier allows remote attackers to include and execute server-side files. Public records do not identify the affected request parameter, PHP file, or include/require call that accepts the filename. Exploitation requires no authentication but has high attack complexity; included attacker-controlled files execute PHP code, while readable local files expose sensitive data.

CVSS severity8.1
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local file inclusion in ThemeREX Kayon 1.3 and earlier allows remote attackers to include and execute server-side files. Public records do not identify the affected request parameter, PHP file, or include/require call that accepts the filename. Exploitation requires no authentication but has high attack complexity; included attacker-controlled files execute PHP code, while readable local files expose sensitive data.

The record

CVE
CVE-2026-28027
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
ThemeREX
Product
Kayon
Classifications
CWE-98, CAPEC-252, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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 <=<= 1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ThemeREX · Kayonversion=n/a <=<= 1.3

Published CVSS scores

8.1PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-98Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
CAPEC-252PHP Local File Inclusion
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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