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CVE-2015-5736

30
FAUCET Score

CVE-2015-5736 describes a local privilege escalation vulnerability in the Fortishield.sys driver of Fortinet FortiClient versions prior to 5.2.4. An authenticated local attacker can execute arbitrary code with kernel privileges by manipulating callback functions via specific ioctl calls. This vulnerability has a CVSS score of 7.2, indicating high severity with complete confidentiality, integrity, and availability impacts. While not listed in CISA's KEV catalog, multiple public exploits exist on ExploitDB, demonstrating its exploitability. There is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.3CPE matchmatch criteria
cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

AV:L/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.03%
Probability of exploitation in next 30 days
EPSS Percentile
79.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-45149 · Aug 5, 2018
This CVE's current EPSS score of 0.0203 is in the 93rd percentile among its peer group of 3,241 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

fortinetvendor investigatingvia nvd_reference
View patch

References

fortiguard.com / advisory/mulitple-vulnerabilities-in-forticlient
packetstormsecurity.com / files/133398/FortiClient-Antivirus-Information-Exposure-Access-Control.html
seclists.org / fulldisclosure/2015/Sep/0
exploit-db.com / exploits/41721
exploit-db.com / exploits/41722
exploit-db.com / exploits/45149
coresecurity.com / advisories/forticlient-antivirus-multiple-vulnerabilities
fortiguard.com / advisory/mulitple-vulnerabilities-in-forticlient
Vendor Advisory
securityfocus.com / archive/1/536369/100/0/threaded
securitytracker.com / id/1033439