M-Files Server up to 25.12.15491.7 API Endpoint improper validation of syntactic correctness of input

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in M-Files Server and classified as problematic. Impacted is an unknown function of the component API Endpoint. The manipulation leads to improper validation of syntactic correctness of input. This vulnerability is traded as CVE-2026-0663. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in M-Files Server and classified as problematic. This issue affects an unknown part of the component API Endpoint. The manipulation with an unknown input leads to a improper validation of syntactic correctness of input vulnerability. Using CWE to declare the problem leads to CWE-1286. The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax. Impacted is availability. The summary by CVE is:

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.

The advisory is shared at product.m-files.com. The identification of this vulnerability is CVE-2026-0663 since 01/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 26.1.15632.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-3685) and CERT Bund (WID-SEC-2026-0185). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • M-Files M-Files Server

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.8
VulDB Meta Temp Score: 3.7

VulDB Base Score: 2.7
VulDB Temp Score: 2.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.9
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper validation of syntactic correctness of input
CWE: CWE-1286 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Server 26.1.15632.3

Timelineinfo

01/07/2026 CVE reserved
01/21/2026 +14 days Advisory disclosed
01/21/2026 +0 days VulDB entry created
02/03/2026 +13 days VulDB entry last update

Sourcesinfo

Advisory: product.m-files.com
Status: Confirmed

CVE: CVE-2026-0663 (🔒)
GCVE (CVE): GCVE-0-2026-0663
GCVE (VulDB): GCVE-100-342149
EUVD: 🔒
CERT Bund: WID-SEC-2026-0185 - M-Files M-Files Server: Schwachstelle ermöglicht Denial of Service

Entryinfo

Created: 01/21/2026 12:35
Updated: 02/03/2026 05:01
Changes: 01/21/2026 12:35 (66), 01/22/2026 01:07 (7), 02/02/2026 23:54 (1), 02/03/2026 05:01 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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