Vulnerability Database

296,746

Total vulnerabilities in the database

CVE-2020-12820

Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon (fcnacd) and potentially execute arbitrary code via requesting a large FortiClient file name. We are not aware of proof of concept code successfully achieving the latter.

  • Published: Dec 19, 2024
  • Updated: May 4, 2025
  • CVE: CVE-2020-12820
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.8
  • AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWEs:

Software From Fixed in
fortinet / fortios 6.0.0 6.0.11
fortinet / fortios - 5.6.13