What is CVE-2025-54820?

CVE-2025-54820 is a high-severity vulnerability in Fortinet Fortimanager, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-03-10.

How severe is CVE-2025-54820?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Fortinet Fortimanager

CVE-2025-54820

A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiManager 7.4.0 through 7.4.2, FortiManager 7.2.0 through 7.2.10, FortiManager 6.4 all versions may allow a remote unauthenticated attacker to execute unauthorized commands via crafted requests, if the service is enabled. The success of the attack depends on the ability to bypass the stack protection mechanisms.

Vulnerability class: Buffer Overflow

EPSS: 0.009 (56.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Fortimanager — versions 7.4.0, 7.2.0, 6.4.0

Weakness classification (CWE)

References

psirt@fortinet.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-54820?: CVE-2025-54820 is a high-severity vulnerability in Fortinet Fortimanager, classified under Stack-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-03-10.
How severe is CVE-2025-54820?: High severity. CVSS v3 base score is 8.1 out of 10.