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M-Files Server CVE-2026-0983

| EUVD-2026-30767 HIGH
Improper Validation of Syntactic Correctness of Input (CWE-1286)
2026-05-18 M-Files Corporation GHSA-x6cg-7p5m-7wcc
Denial Of Service
7.1
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
May 18, 2026 - 13:01 EUVD
Analysis Generated
May 18, 2026 - 12:30 vuln.today
CVSS changed
May 18, 2026 - 12:22 NVD
7.1 (HIGH)

DescriptionNVD

Denial-of-service condition in M-Files Server versions before 26.5.16015.0, before 26.2 LTS, and before 25.8 LTS SR3 allows an authenticated user to cause the MFserver process to crash

AnalysisAI

Denial of service in M-Files Server versions prior to 26.5.16015.0, 26.2 LTS, and 25.8 LTS SR3 allows an authenticated remote attacker to crash the MFserver process, disrupting document management services for all connected users. The flaw is reachable over the network with low privileges and no user interaction, but has no impact on confidentiality or integrity. …

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RemediationAI

Within 24 hours: Inventory all M-Files Server deployments and record current versions; no public exploit has been identified, but assess the number of affected users and criticality of stored documents. Within 7 days: Restrict M-Files Server access to essential business users and administrators only; implement monitoring and alerting for unexpected MFserver process failures. …

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CVE-2026-0983 vulnerability details – vuln.today
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