How severe is CVE-2026-0663?

CVE-2026-0663 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-0663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0663?

CVE-2026-0663 affects M-files M-files Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-0663?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-0663 have an EU (EUVD) identifier?

Yes. CVE-2026-0663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3685.

When was CVE-2026-0663 published?

CVE-2026-0663 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2026-0663

CVE-2026-0663 is a medium-severity vulnerability in M-files M-files Server with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1286.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v4: 6.9
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3685
Weakness: CWE-1286
Affected product: M-files M-files Server
Published: 2026-01-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-0663?: 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.
How severe is CVE-2026-0663?: CVE-2026-0663 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-0663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0663?: CVE-2026-0663 affects M-files M-files Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-0663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0663 have an EU (EUVD) identifier?: Yes. CVE-2026-0663 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3685.
When was CVE-2026-0663 published?: CVE-2026-0663 was published on 2026-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:m-files:m-files_server:*:*:*:*:*:*:*:*

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