CVE-2021-37253

M-Files Web before 20.10.9524.1 allows a denial of service via overlapping ranges (in HTTP...

7.5 HighDisputed

M-Files Web before 20.10.9524.1 allows a denial of service via overlapping ranges (in HTTP requests with crafted Range or Request-Range headers). NOTE: this is disputed because the range behavior is the responsibility of the web server, not the responsibility of the individual web application

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

2.93%Up 2.1 points since Dec 6, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2021-37253
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness: CWE-444
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-37253
Updated: 2026-11-02

EUVDEUVD-2021-23825 No score

Record: EUVD-2021-23825
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gpcr-2fv6-73fj 7.5

M-Files Web before 20.10.9524.1 allows a denial of service via overlapping ranges (in HTTP...

M-Files Web before 20.10.9524.1 allows a denial of service via overlapping ranges (in HTTP requests with crafted Range or Request-Range headers).

Record: GHSA-gpcr-2fv6-73fj
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-444
Updated: 2026-11-02

Affected products

m-files web

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-37253 is a high vulnerability (CVSS 7.5) in M-files Web, published December 5, 2021. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 2.93%, the 87th percentile.