CVE-2026-37064Public exploitNetwork attack vector

User enumeration via unauthenticated username checks

Published Aug 27, 2026 · Updated Aug 27, 2026

User enumeration in Veno File Manager 4.4.9 allows remote attackers to identify valid application users via unauthenticated POST requests. The /vfm-admin/ajax/usr-check.php endpoint tests a chosen user_name value and returns an observable response that reveals whether the account exists. Any network-reachable deployment exposing this endpoint can disclose valid usernames for follow-on password attacks, but no password or account access is disclosed.

CVSS severityUnavailable
Unscored
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

User enumeration in Veno File Manager 4.4.9 allows remote attackers to identify valid application users via unauthenticated POST requests. The /vfm-admin/ajax/usr-check.php endpoint tests a chosen user_name value and returns an observable response that reveals whether the account exists. Any network-reachable deployment exposing this endpoint can disclose valid usernames for follow-on password attacks, but no password or account access is disclosed.

The record

CVE
CVE-2026-37064
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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 exploitPublished

Weakness, pattern, technique

T1087Account Discovery

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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