How severe is CVE-2015-5736?

CVE-2015-5736 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2015-5736 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5736?

CVE-2015-5736 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5736?

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-2015-5736 published?

CVE-2015-5736 was published on 2015-09-03 and last updated on 2026-06-17.

CVE-2015-5736

CVE-2015-5736 is a high-severity vulnerability in Fortinet Forticlient with a CVSS 2.0 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-264.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Fortinet Forticlient
Published: 2015-09-03
Last modified: 2026-06-17

Description

The Fortishield.sys driver in Fortinet FortiClient before 5.2.4 allows local users to execute arbitrary code with kernel privileges by setting the callback function in a (1) 0x220024 or (2) 0x220028 ioctl call.

Frequently asked questions

What is CVE-2015-5736?: The Fortishield.sys driver in Fortinet FortiClient before 5.2.4 allows local users to execute arbitrary code with kernel privileges by setting the callback function in a (1) 0x220024 or (2) 0x220028 ioctl call.
How severe is CVE-2015-5736?: CVE-2015-5736 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2015-5736 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5736?: CVE-2015-5736 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5736?: 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-2015-5736 published?: CVE-2015-5736 was published on 2015-09-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*

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