Is CVE-2020-12812 actively exploited?

Yes. CVE-2020-12812 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2020-12812 be exploited remotely?

The attack vector of CVE-2020-12812 has not been classified yet.

What is the CVSS score of CVE-2020-12812?

CVE-2020-12812 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2020-12812

HIGHCISA KEVIN THE WILD

CVE-2020-12812

Published: November 3, 2021

EPSS:47.04%probability of exploitation in 30 daysPercentile:97.6th

Official 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.

NVD Source

CISA KEV Advisory

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This improper authentication vulnerability in Fortinet FortiOS SSL VPN allows a user to bypass the second factor of authentication (FortiToken) by changing the case of their username. The high EPSS score of 0.47037 and its presence in CISA's KEV indicate that this flaw is actively exploited and presents a critical risk to VPN security.

This vulnerability is actively exploited in the wild and is listed in CISA's Known Exploited Vulnerabilities Catalog. It can be exploited remotely.

Recommended Action

Apply the latest security updates for Fortinet FortiOS to address the improper authentication vulnerability. Implement strong authentication policies and regularly audit VPN access logs.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2020-12812 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2020-12812 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.