CVE-2021-41808

Sensitive authentication-data exposure via event logging

Published Jan 18, 2022 · Updated Feb 23, 2026

Information exposure in M-Files Server before 21.11.10775.0 allows local users to read sensitive federated-authentication data from logs. When federated-authentication logging is enabled, the server writes sensitive authentication information to the Windows event log instead of excluding it. The setting is disabled by default, and access requires high local privileges; the reported impact is limited to disclosure of logged data.

CVSS severity2.0
Low
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in M-Files Server before 21.11.10775.0 allows local users to read sensitive federated-authentication data from logs. When federated-authentication logging is enabled, the server writes sensitive authentication information to the Windows event log instead of excluding it. The setting is disabled by default, and access requires high local privileges; the reported impact is limited to disclosure of logged data.

The record

CVE
CVE-2021-41808
Published
Jan 18, 2022
Updated
Feb 23, 2026
Vendor
M-Files
Product
M-Files Server
Classifications
CWE-532, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2018 <21.11.10775.0
  2. Affected versionversion=Online <21.11.10775.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

M-Files · M-Files Serverversion=2018 <21.11.10775.0; version=Online <21.11.10775.0

Published CVSS scores

2.0M-Files CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N
1.9NIST NVDAV:L/AC:M/Au:N/C:P/I:N/A:N
2.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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