How severe is CVE-2026-22153?

CVE-2026-22153 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-22153 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22153?

CVE-2026-22153 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22153?

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

Does CVE-2026-22153 have an EU (EUVD) identifier?

Yes. CVE-2026-22153 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6387.

When was CVE-2026-22153 published?

CVE-2026-22153 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-22153

CVE-2026-22153 is a high-severity vulnerability in Fortinet Fortios with a CVSS 3.x base score of 8.1. 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-305.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6387
Weakness: CWE-305
Affected product: Fortinet Fortios
Published: 2026-02-10
Last modified: 2026-06-17

Description

An Authentication Bypass by Primary Weakness vulnerability [CWE-305] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an unauthenticated attacker to bypass LDAP authentication of Agentless VPN or FSSO policy, when the remote LDAP server is configured in a specific way.

Frequently asked questions

What is CVE-2026-22153?: An Authentication Bypass by Primary Weakness vulnerability [CWE-305] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an unauthenticated attacker to bypass LDAP authentication of Agentless VPN or FSSO policy, when the remote LDAP server is configured in a specific way.
How severe is CVE-2026-22153?: CVE-2026-22153 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-22153 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22153?: CVE-2026-22153 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22153?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22153 have an EU (EUVD) identifier?: Yes. CVE-2026-22153 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6387.
When was CVE-2026-22153 published?: CVE-2026-22153 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-1052

Affected products (1)

cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

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