How severe is CVE-2026-59836?

CVE-2026-59836 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-59836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-59836?

CVE-2026-59836 affects Fortinet Forticlientems. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-59836?

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.

When was CVE-2026-59836 published?

CVE-2026-59836 was published on 2026-07-14 and last updated on 2026-07-15.

CVE-2026-59836

CVE-2026-59836 is a high-severity vulnerability in Fortinet Forticlientems with a CVSS 3.x base score of 7.5. 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-295.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Fortinet Forticlientems
Published: 2026-07-14
Last modified: 2026-07-15

Description

A improper certificate validation vulnerability in Fortinet FortiClientEMS 7.4.3 through 7.4.5, FortiClientEMS 7.4.0 through 7.4.1, FortiClientEMS 7.2 all versions may allow attacker to information disclosure via <insert attack vector here>

Frequently asked questions

What is CVE-2026-59836?: A improper certificate validation vulnerability in Fortinet FortiClientEMS 7.4.3 through 7.4.5, FortiClientEMS 7.4.0 through 7.4.1, FortiClientEMS 7.2 all versions may allow attacker to information disclosure via <insert attack vector here>
How severe is CVE-2026-59836?: CVE-2026-59836 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-59836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-59836?: CVE-2026-59836 affects Fortinet Forticlientems. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-59836?: 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.
When was CVE-2026-59836 published?: CVE-2026-59836 was published on 2026-07-14 and last updated on 2026-07-15.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-147

Affected products (1)

cpe:2.3:a:fortinet:forticlientems:*:*:*:*:*:*:*:*

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