Is CVE-2020-12812 exploitable?

Yes — CVE-2020-12812 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it is confirmed exploited in the wild.

Is CVE-2020-12812 a false positive?

No practitioners have marked CVE-2020-12812 a false positive so far (3 verdicts).

How do I remediate CVE-2020-12812?

Practitioners have shared remediation steps for CVE-2020-12812 — see the remediation notes on this page.

CVE-2020-12812

is CVE-2020-12812real, exploitable, or a false positive? Here's the community ground truth.

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Critical · CVSS 9.8EPSS 49.3%CISA KEVCWE-178

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

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.

References

NVD MITRE CVE.org CISA KEV

Published Jul 24, 2020

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Community ground truth

Community verdict

3 verdicts

Not a real issue

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Community real-world severity: Critical (Critical 3) — CVSS base score 9.8

In line with its CVSS base score.

Field notes & remediation

Verdicts are the quick signal — notes are the evidence and fixes behind them.

0
Field note · Aisha RahmanCurated
Fortinet FortiOS SSL VPN Improper Authentication Vulnerability — 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. Listed in the CISA KEV catalog (added 2021-11-03) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~49%. Treat it as real and prioritize remediation over triage.
0
Remediation · Tomáš NovákCurated
Required action for Fortinet FortiOS: Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-05-03. After patching, verify the vulnerable path is no longer reachable before closing the finding.