CVE record · CVE-2020-12812

Improper authentication in Fortinet FortiOS

CVSS 7.5 HighCriticalIn CISA KEV · ransomwareEPSS 0.45 · 98th percentile

Critical, because:

In CISA’s KEV catalogue since 3 Nov 2021: it is known to be exploited.
CVSS score 7.5 (7.0 or more) and EPSS 0.45 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: fortinet) at 24 Jul 2020, 22:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Fortinet FortiOS	affected FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below

Identifiers: CVE-2020-12812
CNA: fortinet
Weakness (CWE): CWE-287
Tags: Fortinet FortiOS
Authentication bypass
Published: 24 Jul 2020
Updated: 1 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	ADP (CISA-ADP)

CISA KEV Listed since 3 Nov 2021: known to be exploited. CISA reports use in ransomware campaigns.
EPSS 0.45, the 98th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 24 Jul 2020. New records show when each source confirmed them.

Sources

References from the CNA

fortiguard.com/psirt/FG-IR-19-283

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.