CVE-2021-36166

highpriority · track · 40OT risk · elevatedEPSS 0.015 · 74 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.47% (74th) EPSS

CVSS 7.5 · high

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

An improper authentication vulnerability in FortiMail before 7.0.1 may allow a remote attacker to efficiently guess one administrative account's authentication token by means of the observation of certain system's properties.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:Csecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@fortinet.comexploitability 3.9 · impact 5.9

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-330USprimaryCWE-287US

affected products (10)

Products and version ranges known to be affected.

Fortinet Fortinet FortiMail≤ FortiMail before 7.0.1enisa_euvdEU
Fortinet Inc. FortiMail≤ 6.0.12fstec_bduRU
Fortinet Inc. FortiMail≤ 6.2.8fstec_bduRU
Fortinet Inc. FortiMail≤ 6.4.6fstec_bduRU
Fortinet Inc. FortiMail≤ 7.0.1fstec_bduRU
fortinet fortimail≤ 5.4.12nvdUScpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
fortinet fortimail6.0.0 → 6.0.12nvdUScpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
fortinet fortimail6.2.0 → 6.2.8nvdUScpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
fortinet fortimail6.4.0 → 6.4.6nvdUScpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*
fortinet fortimail= 7.0.0nvdUScpe:2.3:a:fortinet:fortimail:*:*:*:*:*:*:*:*

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2022-03-01modified 2026-06-17

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references (7)

External citations — patches, advisories, analysis.

scry

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