Medium severity · published Jan 21, 2026
CVE-2026-0663
Denial of Service condition in M-Files Server
4.9
CVSS
0.4%
EPSS
No
On KEV
Description
Denial-of-service vulnerability in M-Files Server versions before 26.1.15632.3 allows an authenticated attacker with vault administrator privileges to crash the M-Files Server process by calling a vulnerable API endpoint.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
M-Files Server · M-Files Corporation
before 26.1.15632.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0663
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0663
empower.m-files.com
https://empower.m-files.com/security-advisories/CVE-2026-0663
Broken Link
https://product.m-files.com/security-advisories/cve-2026-0663/
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