An Insecure Temporary File vulnerability in FortiClient for Windows 6.2.1 and below may allow a local user to gain elevated privileges via…

published 2020-06-01 6y ago modified 2026-06-17 4mo ago also EUVD-2020-30117

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

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.

Is CVE-2020-9291 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2y ago (2024-10-23)

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.3	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	4.6	AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

Fortinet Fortinet FortiClient for Windows

Classification

Weakness

CWE-668 Exposure of Resource to Wrong Sphere

Technology feeds

Fortinet rss critical rss

References

fortiguard.com /psirt/FG-IR-20-040
vendor-advisory
fortiguard.com /psirt/FG-IR-20-040
broken-link

Sources

CVE List CVE-2020-9291
NVD CVE-2020-9291

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.