Critical severity · published May 12, 2026
CVE-2026-44277
A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticator 6.6.0 through 6.6.8, FortiAuthenticator 6.5.0 through…
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
A improper access control vulnerability in Fortinet FortiAuthenticator 8.0.2, FortiAuthenticator 8.0.0, FortiAuthenticator 6.6.0 through 6.6.8, FortiAuthenticator 6.5.0 through 6.5.6 may allow attacker to execute unauthorized code or commands via crafted requests.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiAuthenticator · Fortinet
8.0.2; 8.0.0; 6.6.0 through 6.6.8; 6.5.0 through 6.5.6; 6.4.0 through 6.4.10 · source: vendor, NVD
In the news
VulnerabilityCritical
Critical Fortinet vulnerabilities fixed in FortiSandbox and FortiAuthenticator
Fortinet patched critical flaws in FortiSandbox and FortiAuthenticator that could let attackers remotely execute code on unpatched systems. Fortinet addressed two critical vulnerabilities affecting FortiSandbox and FortiAuthenticator. The flaws could allow attackers to execute arbitrary commands or code on unpatched systems. The first vulnerability, tracked as CVE-2026-44277, is an improper access control issue in FortiAuthenticator. […]
May 13, 2026·Security Affairs
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44277
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44277
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-26-128
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