What is CVE-2020-9291?

CVE-2020-9291 is a medium-severity vulnerability in Fortinet Forticlient, classified under Exposure of Resource to Wrong Sphere. CVSS score: 6.3/10. Published 2020-06-01.

How severe is CVE-2020-9291?

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

Vulnerability in Fortinet Forticlient

CVE-2020-9291

An Insecure Temporary File vulnerability in FortiClient for Windows 6.2.1 and below may allow a local user to gain elevated privileges via exhausting the pool of temporary file names combined with a symbolic link attack.

Published 2020-06-01 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.005 (42.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Fortinet Forticlient
Fortinet Forticlient For Windows — versions FortiClient for Windows 6.2.1 and earlier and FortiClient for Windows 6.0.9 and earlier

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

fortiguard.com/psirt/FG-IR-20-040 (Broken Link)
www.fortiguard.com/psirt/FG-IR-20-040 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-9291?: CVE-2020-9291 is a medium-severity vulnerability in Fortinet Forticlient, classified under Exposure of Resource to Wrong Sphere. CVSS score: 6.3/10. Published 2020-06-01.
How severe is CVE-2020-9291?: Medium severity. CVSS v3 base score is 6.3 out of 10.