CVE-2020-12820
HIGH EPSS 54.0%
Published Dec 19, 20241y ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
Published Dec 19, 2024 1y ago
Last Modified Jun 17, 2026 2w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
54.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-121
CWE-787 Out-of-bounds Write Memory Safety
Affected Products 2
References 1
- fortiguard.fortinet.com https://fortiguard.fortinet.com/psirt/FG-IR-20-083
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.