CVE-2020-12812CISA KEVEPSS p98.7%

CVE-2020-12812Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

Fortinet / FortiOS

Description

Fortinet FortiOS SSL VPN contains an improper authentication vulnerability that may allow a user to login successfully without being prompted for the second factor of authentication (FortiToken) if they change the case in their username.

Scoring

EPSS49.34% probability of exploitation · percentile 98.7% · 2026-06-18T12:00:27Z

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntryFortinet FortiOS SSL VPN Improper Authentication Vulnerabilitykev-cve-2020-128120%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
Fortinet FortiOS and FortiProxy Improper Authorization
CVE
CVE-2022-40684
CVE
Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
CVE
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
CVE
CVE-2026-44277
CVE
CVE-2025-24471
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.