CVE-2020-12812

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 45.38%
EPSS Percentile: 98.76%
CISA KEV: YES — Known Exploited Vulnerability

Description

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 25-Jul-2020 06:15
Last Modified: 02-Oct-2026 21:54
EPSS Date: 2026-10-12
CWE: CWE-178, CWE-287

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2021-11-03
Remediation Due: 2022-05-03
Known Ransomware Campaign Use: Known
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2020-12812

Affected Products / Versions

fortinet / fortios
Version / affected range: * · before (exclusive) 6.0.10
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet / fortios
Version / affected range: * · from (inclusive) 6.2.0 · before (exclusive) 6.2.4
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
fortinet / fortios
Version / affected range: 6.4.0
cpe:2.3:o:fortinet:fortios:6.4.0:*:*:*:*:*:*:*

References

Last enrichment sync: 24-Oct-2026 05:10
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CVE-2020-12812 Q1 2026 Threat Review Details Risks Facing U.S. Public Sector

CVE (5)

Threat Actors (2)

Vendors (7)

Products (6)

Tools (1)

Industries (4)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.