CVE-2020-12812
Fortinet FortiOS: SSL VPN Improper Authentication
As of , CVE-2020-12812 in Fortinet FortiOS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 3 November 2021
- US federal deadline
- 3 May 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Known
- EPSS score
- 0.45Higher than 98% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
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.
CISA's description
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.
The CVE record's description, from fortinet
- CVE published
- 24 July 2020
- Assigned by
- fortinet
- CVSS
- 7.5 High (CVSS 3.1, from CISA-ADP)
- CWE-287
- Improper Authentication
- CWE-178
- Improper Handling of Case Sensitivity
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- partial
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
FortiOS: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2018-13379SSL VPN Path Traversal | Fortinet FortiOS | Patch this weekRansomware use; Metasploit module; EPSS 0.99 | 0.99 | ||
| CVE-2024-21762Out-of-Bound Write | Fortinet FortiOS | Patch this weekRansomware use; EPSS 0.83 | 0.83 | ||
| CVE-2022-42475Heap-Based Buffer Overflow | Fortinet FortiOS | Patch this weekRansomware use; EPSS 0.99 | 0.99 | ||
| CVE-2019-5591Default Configuration | Fortinet FortiOS | Patch this weekRansomware use | 0.18 | ||
| CVE-2019-6693Use of Hard-Coded Credentials | Fortinet FortiOS | Patch this weekRansomware use | 0.06 | ||
| CVE-2025-68686Exposure of Sensitive Information to an Unauthorized Actor | Fortinet FortiOS | Patch soon | 0.30 | ||
| CVE-2022-41328Path Traversal | Fortinet FortiOS | Patch soon | 0.11 | ||
| CVE-2021-44168Arbitrary File Download | Fortinet FortiOS | Patch soon | 0.01 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org