What is CVE-2025-46776?

CVE-2025-46776 is a medium-severity vulnerability in Fortinet Fortiextender, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.3/10. Published 2025-11-18.

How severe is CVE-2025-46776?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Buffer overflow in Fortinet Fortiextender

CVE-2025-46776

A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiExtender 7.6.0 through 7.6.1, FortiExtender 7.4.0 through 7.4.6, FortiExtender 7.2 all versions, FortiExtender 7.0 all versions may all…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (4.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C.

Affected products

Fortinet Fortiextender — versions 7.6.0, 7.4.0, 7.2.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-251

Frequently asked questions

What is CVE-2025-46776?: CVE-2025-46776 is a medium-severity vulnerability in Fortinet Fortiextender, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.3/10. Published 2025-11-18.
How severe is CVE-2025-46776?: Medium severity. CVSS v3 base score is 6.3 out of 10.