CVE-2023-3405Network attack vector

Unauthenticated server crash via unchecked parameter

Published Jun 27, 2023 · Updated Feb 23, 2026

An uncaught exception in affected M-Files Server releases before 23.6.12695.3 allows remote attackers to crash the service anonymously. The server accepts an unchecked parameter value and lets the resulting exception escape, terminating the MFServer service. No account or user interaction is required; the consequence is a remotely triggered service interruption, and M-Files has not disclosed the affected parameter or request path.

CVSS severity7.5
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An uncaught exception in affected M-Files Server releases before 23.6.12695.3 allows remote attackers to crash the service anonymously. The server accepts an unchecked parameter value and lets the resulting exception escape, terminating the MFServer service. No account or user interaction is required; the consequence is a remotely triggered service interruption, and M-Files has not disclosed the affected parameter or request path.

The record

CVE
CVE-2023-3405
Published
Jun 27, 2023
Updated
Feb 23, 2026
Vendor
M-Files
Product
M-Files Server
Classifications
CWE-248, CAPEC-129, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 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=0 <23.6.12695.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

M-Files · M-Files Serverversion=0 <23.6.12695.3

Published CVSS scores

7.5M-Files CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-248Uncaught Exception
CAPEC-129Pointer Manipulation
T1499.004Application or System Exploitation

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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