How severe is CVE-2026-44277?

CVE-2026-44277 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-44277 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44277?

CVE-2026-44277 affects Fortinet Fortiauthenticator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44277?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-44277 have an EU (EUVD) identifier?

Yes. CVE-2026-44277 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29729.

When was CVE-2026-44277 published?

CVE-2026-44277 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-44277

CVE-2026-44277 is a critical-severity vulnerability in Fortinet Fortiauthenticator with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29729
Weakness: CWE-284
Affected product: Fortinet Fortiauthenticator
Published: 2026-05-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 6.5.6 may allow attacker to execute unauthorized code or commands via crafted requests.
How severe is CVE-2026-44277?: CVE-2026-44277 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-44277 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44277?: CVE-2026-44277 affects Fortinet Fortiauthenticator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-44277 have an EU (EUVD) identifier?: Yes. CVE-2026-44277 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29729.
When was CVE-2026-44277 published?: CVE-2026-44277 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-128

Affected products (1)

cpe:2.3:a:fortinet:fortiauthenticator:*:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiauthenticator

CVE-2013-6990 — Critical (CVSS 9.0): FortiGuard FortiAuthenticator before 3.0 allows remote administrators to gain privileges via the command line interface.
CVE-2021-43067 — High (CVSS 8.3): A exposure of sensitive information to an unauthorized actor in Fortinet FortiAuthenticator version 6.4.0, version…
CVE-2025-53379 — High (CVSS 7.5): A out-of-bounds read vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.2, FortiAuthenticator 6.5 all…
CVE-2021-22124 — High (CVSS 7.5): An uncontrolled resource consumption (denial of service) vulnerability in the login modules of FortiSandbox 3.2.0…
CVE-2015-1455 — High (CVSS 7.5): Fortinet FortiAuthenticator 3.0.0 has a password of (1) slony for the slony PostgreSQL user and (2) www-data for the…
CVE-2026-21743 — High (CVSS 7.2): A missing authorization vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all…

All CVEs affecting Fortinet Fortiauthenticator →

Other CWE-284 (Improper Access Control) vulnerabilities

CVE-2026-83944 — Critical (CVSS 10.0): Improper access control in Azure Logic Apps allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-20192 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine…
CVE-2026-87230 — Critical (CVSS 10.0): Vulnerability in the Oracle Hyperion Financial Management product of Oracle Hyperion (component: Security). The…
CVE-2026-54745 — Critical (CVSS 10.0): Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.17.0,…
CVE-2026-18886 — Critical (CVSS 10.0): ServiceNow has remediated an improper access control vulnerability that was identified in the ServiceNow AI platform.…
CVE-2026-76607 — Critical (CVSS 10.0): Joomla Extension - fabrikar.com - Missing ACL check in download element in Fabrik < 4.7.2.

Browse all CWE-284 (Improper Access Control) vulnerabilities →