CVE-2021-26110

Name: CVE-2021-26110
Creator: NVD / NIST
Published: 2021-12-08T11:15:11.683+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2021-26110 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An improper access control vulnerability [CWE-284] in FortiOS autod daemon 7.0.0, 6.4.6 and below, 6.2.9 and below, 6.0.12 and below and FortiProxy 2.0.1 and below, 1.2.9 and below may allow an authenticated low-privileged attacker to escalate their privileges to super_admin via a specific crafted configuration of fabric automation CLI script and auto-script features.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

An improper access control vulnerability [CWE-284] in FortiOS autod daemon 7.0.0, 6.4.6 and below, 6.2.9 and below, 6.0.12 and below and FortiProxy 2.0.1 and below, 1.2.9 and below may allow an authenticated low-privileged attacker to escalate their privileges to super_admin via a specific crafted configuration of fabric automation CLI script and auto-script features.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.25%

15.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Fortinet	Fortiproxy	>= 1.0.0, <= 1.0.7
Fortinet	Fortiproxy	>= 1.1.0, <= 1.1.6
Fortinet	Fortiproxy	>= 1.2.0, <= 1.2.9
Fortinet	Fortiproxy	2.0.0
Fortinet	Fortiproxy	2.0.1
Fortinet	Fortios	>= 5.6.0, <= 5.6.14
Fortinet	Fortios	>= 6.0.0, <= 6.0.12
Fortinet	Fortios	>= 6.2.0, <= 6.2.9
Fortinet	Fortios	>= 6.4.0, <= 6.4.6
Fortinet	Fortios	7.0.0

References

https://fortiguard.com/advisory/FG-IR-20-131Vendor Advisory
https://fortiguard.com/advisory/FG-IR-20-131Vendor Advisory

Timeline

Published: Dec 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26110?

How severe is CVE-2021-26110?

CVE-2021-26110 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26110?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26110?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST