CVE-2026-37637Public exploitNetwork attack vector

Remote code execution via unrestricted PHP upload

Published Jun 29, 2026 · Updated Jun 29, 2026

Unrestricted file upload in Alexantr filemanager 1.0 allows remote attackers to execute arbitrary code through filemanager.php. The upload path accepts executable PHP files without restricting their extension, MIME type, content, destination, or execution permissions, then stores them in a web-accessible directory. Reachability and authentication depend on deployment configuration; successful execution runs with the web server process's privileges.

CVSS severity9.1
Critical
EPSS probability0.66%
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 Alexantr filemanager 1.0 allows remote attackers to execute arbitrary code through filemanager.php. The upload path accepts executable PHP files without restricting their extension, MIME type, content, destination, or execution permissions, then stores them in a web-accessible directory. Reachability and authentication depend on deployment configuration; successful execution runs with the web server process's privileges.

The record

CVE
CVE-2026-37637
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1505.003, T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1505.003Web Shell
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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