October 19, 2026

CVE Watchtower

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CVE-2020-12812NVD

Vulnerability Summary

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.
Severity Level
CRITICAL(9.8)
Published Date
Jul 24, 2020
Last Modified
Oct 2, 2026
Exploitation Status
ACTIVE
EPSS Score (30-Day)
45.38%Probability
Root Weakness (CWE)
CWE-178: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CWE-287: Improper Authentication ↗
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Fortinet Fortios < 6.0.10
  • Fortinet Fortios >= 6.2.0 and < 6.2.4
  • Fortinet Fortios
Patched Versions
  • Fortinet Fortios 6.0.10
  • Fortinet Fortios 6.2.4
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🚫Ad-Free — Uninterrupted experience.
🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References