How severe is CVE-2026-25836?

CVE-2026-25836 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-25836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25836?

CVE-2026-25836 affects Fortinet Fortisandbox Cloud. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25836?

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-2026-25836 have an EU (EUVD) identifier?

Yes. CVE-2026-25836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10531.

When was CVE-2026-25836 published?

CVE-2026-25836 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-25836

CVE-2026-25836 is a high-severity vulnerability in Fortinet Fortisandbox Cloud with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10531
Weakness: CWE-78
Affected product: Fortinet Fortisandbox Cloud
Published: 2026-03-10
Last modified: 2026-06-17

Description

An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox Cloud 5.0.4, FortiSandbox PaaS 5.0.4 may allow a privileged attacker with super-admin profile and CLI access to execute unauthorized code or commands via crafted HTTP requests.

Frequently asked questions

What is CVE-2026-25836?: An improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox Cloud 5.0.4, FortiSandbox PaaS 5.0.4 may allow a privileged attacker with super-admin profile and CLI access to execute unauthorized code or commands via crafted HTTP requests.
How severe is CVE-2026-25836?: CVE-2026-25836 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-25836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25836?: CVE-2026-25836 affects Fortinet Fortisandbox Cloud. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25836?: 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-2026-25836 have an EU (EUVD) identifier?: Yes. CVE-2026-25836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10531.
When was CVE-2026-25836 published?: CVE-2026-25836 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-096

Affected products (1)

cpe:2.3:a:fortinet:fortisandbox_cloud:5.0.4:*:*:*:*:*:*:*

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