CVE-2026-59840

A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to information disclosure via <insert attack vector here>

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://fortiguard.fortinet.com/psirt/FG-IR-26-154	Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-864900.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fortinet:fortiproxy::::::::
	cpe:2.3:a:fortinet:fortiproxy::::::::
	cpe:2.3:o:fortinet:fortios::::::::
	cpe:2.3:o:fortinet:fortios::::::::

History

No history.

Information

Published : 2026-07-14 16:17

Updated : 2026-08-11 13:19

NVD link : CVE-2026-59840

Mitre link : CVE-2026-59840

CVE.ORG link : CVE-2026-59840

JSON object : View

Products Affected

fortinet

fortios
fortiproxy

CWE

CWE-126

Buffer Over-read

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"versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-07-14T16:17:03.297", "references": [{"url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-154", "tags": ["Vendor Advisory"], "source": "psirt@fortinet.com"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-864900.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "psirt@fortinet.com", "description": [{"lang": "en", "value": "CWE-126"}]}], "descriptions": [{"lang": "en", "value": "A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to information disclosure via <insert attack vector here>"}], "lastModified": "2026-08-11T13:19:01.330", 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