CVE-2026-0983Network attack vector

Authenticated server-process crash

Published May 18, 2026 · Updated May 18, 2026

Denial of service in M-Files Server before 26.5.16015.0 allows remote authenticated users to crash the MFserver process. M-Files has not published the affected input path or how syntactic validation fails before the server process terminates. Any authenticated network user who can reach an affected server can interrupt its document-vault service; no confidentiality or integrity impact is reported.

CVSS severity7.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in M-Files Server before 26.5.16015.0 allows remote authenticated users to crash the MFserver process. M-Files has not published the affected input path or how syntactic validation fails before the server process terminates. Any authenticated network user who can reach an affected server can interrupt its document-vault service; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2026-0983
Published
May 18, 2026
Updated
May 18, 2026
Vendor
M-Files
Product
M-Files Server
Classifications
CWE-1286, CAPEC-153, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 18, 2026CVE publishedPublication date reported by the CVE source.
  2. May 18, 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 <26.5.16015.0
  2. Affected versionversion=LTS 25.8.15085.13 <LTS 25.8.15085.24
  3. Affected versionversion=LTS 26.2.15718.8 <LTS 26.2.15718.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

M-Files · M-Files Serverversion=0 <26.5.16015.0; version=LTS 25.8.15085.13 <LTS 25.8.15085.24; version=LTS 26.2.15718.8 <LTS 26.2.15718.10

Published CVSS scores

7.1M-Files CorporationCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1286Improper Validation of Syntactic Correctness of Input
CAPEC-153Input Data Manipulation
T1499Endpoint Denial of Service

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.

Technologies

Your stack

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Your stack

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