CVE-2021-44172

Unauthenticated environment disclosure via sign-in homepage

Published Sep 13, 2023 · Updated Sep 24, 2024

Information disclosure in affected Fortinet FortiClient EMS 6.2, 6.4, and 7.0 releases allows remote attackers to read server environment variables. The unauthenticated sign-in homepage exposes environment variables from the version-management interface, including the EMS installation path. Network access to the management interface is sufficient; disclosure is limited to server environment details useful for reconnaissance, with no direct write or service-interruption impact reported.

CVSS severity5.3
Medium
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Fortinet FortiClient EMS 6.2, 6.4, and 7.0 releases allows remote attackers to read server environment variables. The unauthenticated sign-in homepage exposes environment variables from the version-management interface, including the EMS installation path. Network access to the management interface is sufficient; disclosure is limited to server environment details useful for reconnaissance, with no direct write or service-interruption impact reported.

The record

CVE
CVE-2021-44172
Published
Sep 13, 2023
Updated
Sep 24, 2024
Vendor
Fortinet
Product
FortiClient EMS
Classifications
CWE-200, T1592
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record 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=6.2.0 <=6.2.4
  2. Affected versionversion=6.2.6 <=6.2.9
  3. Affected versionversion=6.4.0 <=6.4.4
  4. Affected versionversion=6.4.7 <=6.4.9
  5. Affected versionversion=7.0.0 <=7.0.4
  6. Affected versionversion=7.0.6 <=7.0.7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Fortinet · FortiClient EMSversion=6.2.0 <=6.2.4; version=6.2.6 <=6.2.9; version=6.4.0 <=6.4.4; version=6.4.7 <=6.4.9; version=7.0.0 <=7.0.4; version=7.0.6 <=7.0.7

Published CVSS scores

4.3FortinetCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.6FortinetCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:U
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1592Gather Victim Host Information

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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