CVE-2020-12812

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.454 · 99 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

45.4% (99th) EPSS

CVSS 7.5 · high

Is it mine?

39 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

added 2021-11-03remediate by 2022-05-03

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-26

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.

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:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: active · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-178USprimaryCWE-287USprimaryCWE-287US

ATT&CK techniques

ATT&CK techniques this enables or maps to.

affected products (39)

Products and version ranges known to be affected.

n/a Fortinet FortiOS≤ FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and belowenisa_euvdEU
Fortinet Inc. FortiOS≤ 6.4.1fstec_bduRU
Fortinet Inc. FortiOS≤ 6.0.10fstec_bduRU
Fortinet Inc. FortiOS≤ 6.2.4fstec_bduRU
Fortinet Inc. FortiProxy≤ 2.0.1fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.9fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.8fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.7fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.6fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.5fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.4fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.3fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.2fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.11fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.10fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.1fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.2.0fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.1.6fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.1.5fstec_bduRU
Fortinet Inc. FortiProxy≤ 1.1.4fstec_bduRU

showing 20 of 39

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 CVE.org MITRE

published 2020-07-24modified 2026-08-12

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+7820 more

references (7)

External citations — patches, advisories, analysis.

scry

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