CVE-2026-59840 - Vulnerability Details

- Buffer Over-Read Vulnerability Allowing Information Disclosure in Fortinet FortiOS and FortiProxy

Description

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>

Published: 2026-07-14

Score: 4.1 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Fortinet

FortiOS

unaffected

Version	Status	Constraints
`7.6.0`	affected	≤ 7.6.3
`7.4.0`	affected	≤ 7.4.8
`7.2.0`	affected	≤ 7.2.13
`7.0.0`	affected	≤ 7.0.19
`6.4.0`	affected	≤ 6.4.16

Fortinet

FortiPAM

unaffected

Version	Status	Constraints
`1.7.0`	affected	—
`1.6.0`	affected	≤ 1.6.2
`1.5.0`	affected	≤ 1.5.1
`1.4.0`	affected	≤ 1.4.3
`1.3.0`	affected	≤ 1.3.1
`1.2.0`	affected	—
`1.1.0`	affected	≤ 1.1.2
`1.0.0`	affected	≤ 1.0.3

Fortinet

FortiSwitchManager

unaffected

Version	Status	Constraints
`7.2.0`	affected	≤ 7.2.7
`7.0.0`	affected	≤ 7.0.6

Fortinet

FortiProxy

unaffected

Version	Status	Constraints
`7.6.0`	affected	≤ 7.6.5
`7.4.0`	affected	≤ 7.4.13
`7.2.0`	affected	≤ 7.2.16
`7.0.0`	affected	≤ 7.0.23

No data.

Vendor Product Confidence Versions

Fortinet

Fortios

90%

Version	Status	Scheme	Platform
`[7.6.0,7.6.2]`	affected	semver	—
`[7.4.0,7.4.8]`	affected	semver	—
`[7.2.0,7.2.13]`	affected	semver	—
`[7.0.0,7.0.19]`	affected	semver	—
`[6.4.0,6.4.16]`	affected	semver	—

Fortinet

Fortipam

90%

Version	Status	Scheme	Platform
`1.7.0`	affected	semver	—
`[1.6.0,1.6.2]`	affected	semver	—
`[1.5.0,1.5.1]`	affected	semver	—
`[1.4.0,1.4.3]`	affected	semver	—
`[1.3.0,1.3.1]`	affected	semver	—
`1.2.0`	affected	semver	—
`[1.1.0,1.1.2]`	affected	semver	—
`[1.0.0,1.0.3]`	affected	semver	—

Fortinet

Fortiproxy

90%

Version	Status	Scheme	Platform
`[7.6.0,7.6.2]`	affected	semver	—
`[7.4.0,7.4.8]`	affected	semver	—
`[7.2.0,7.2.13]`	affected	semver	—
`[7.0.0,7.0.19]`	affected	semver	—
`[6.4.0,6.4.16]`	affected	semver	—

Fortinet

Fortiproxy

100%

Version	Status	Scheme	Platform
`[7.6.0,7.6.5]`	affected	semver	—
`[7.4.0,7.4.13]`	affected	semver	—
`[7.2.0,7.2.15]`	affected	semver	—
`7.2.16`	affected	semver	—

Fortinet

Fortiswitchmanager

90%

Version	Status	Scheme	Platform
`[7.2.0,7.2.7]`	affected	semver	—
`[7.0.0,7.0.6]`	affected	semver	—

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Remediation

Vendor Solution

Upgrade to FortiOS version 7.6.4 or above Upgrade to FortiOS version 7.4.9 or above Fortinet remediated this issue in FortiSASE version 25.4.b and hence customers do not need to perform any action. Upgrade to FortiProxy version 7.6.6 or above Upgrade to FortiProxy version 7.4.14 or above

Tracking

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Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0018.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://fortiguard.fortinet.com/psirt/FG-IR-26-154

History

Fri, 17 Jul 2026 07:30:00 +0000

Type	Values Removed	Values Added
Title		Buffer Over-Read Vulnerability Allowing Information Disclosure in Fortinet FortiOS and FortiProxy

Thu, 16 Jul 2026 14:45:00 +0000

Type	Values Removed	Values Added
Description	A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.2, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions may allow attacker to information disclosure via <insert attack vector here>	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>
CPEs		cpe:2.3:o:fortinet:fortios:7.6.3:::::::*

Tue, 14 Jul 2026 16:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 14 Jul 2026 15:45:00 +0000

Type	Values Removed	Values Added
Description		A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.2, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions may allow attacker to information disclosure via <insert attack vector here>
First Time appeared		Fortinet Fortinet fortios Fortinet fortipam Fortinet fortiproxy Fortinet fortiswitchmanager
Weaknesses		CWE-126
CPEs		cpe:2.3:a:fortinet:fortiproxy:7.0.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.10:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.11:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.12:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.13:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.14:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.15:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.16:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.17:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.18:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.19:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.20:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.21:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.22:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.23:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.5:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.6:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.7:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.8:::::::* cpe:2.3:a:fortinet:fortiproxy:7.0.9:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.10:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.11:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.12:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.13:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.14:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.15:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.16:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.5:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.6:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.7:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.8:::::::* cpe:2.3:a:fortinet:fortiproxy:7.2.9:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.10:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.11:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.12:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.13:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.5:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.6:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.7:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.8:::::::* cpe:2.3:a:fortinet:fortiproxy:7.4.9:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.0:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.1:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.2:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.3:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.4:::::::* cpe:2.3:a:fortinet:fortiproxy:7.6.5:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.0:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.1:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.2:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.3:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.4:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.5:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.0.6:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.0:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.1:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.2:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.3:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.4:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.5:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.6:::::::* cpe:2.3:a:fortinet:fortiswitchmanager:7.2.7:::::::* cpe:2.3:o:fortinet:fortios:6.4.0:::::::* cpe:2.3:o:fortinet:fortios:6.4.10:::::::* cpe:2.3:o:fortinet:fortios:6.4.11:::::::* cpe:2.3:o:fortinet:fortios:6.4.12:::::::* cpe:2.3:o:fortinet:fortios:6.4.13:::::::* cpe:2.3:o:fortinet:fortios:6.4.14:::::::* cpe:2.3:o:fortinet:fortios:6.4.15:::::::* cpe:2.3:o:fortinet:fortios:6.4.16:::::::* cpe:2.3:o:fortinet:fortios:6.4.1:::::::* cpe:2.3:o:fortinet:fortios:6.4.2:::::::* cpe:2.3:o:fortinet:fortios:6.4.3:::::::* cpe:2.3:o:fortinet:fortios:6.4.4:::::::* cpe:2.3:o:fortinet:fortios:6.4.5:::::::* cpe:2.3:o:fortinet:fortios:6.4.6:::::::* cpe:2.3:o:fortinet:fortios:6.4.7:::::::* cpe:2.3:o:fortinet:fortios:6.4.8:::::::* cpe:2.3:o:fortinet:fortios:6.4.9:::::::* cpe:2.3:o:fortinet:fortios:7.0.0:::::::* cpe:2.3:o:fortinet:fortios:7.0.10:::::::* cpe:2.3:o:fortinet:fortios:7.0.11:::::::* cpe:2.3:o:fortinet:fortios:7.0.12:::::::* cpe:2.3:o:fortinet:fortios:7.0.13:::::::* cpe:2.3:o:fortinet:fortios:7.0.14:::::::* cpe:2.3:o:fortinet:fortios:7.0.15:::::::* cpe:2.3:o:fortinet:fortios:7.0.16:::::::* cpe:2.3:o:fortinet:fortios:7.0.17:::::::* cpe:2.3:o:fortinet:fortios:7.0.18:::::::* cpe:2.3:o:fortinet:fortios:7.0.19:::::::* cpe:2.3:o:fortinet:fortios:7.0.1:::::::* cpe:2.3:o:fortinet:fortios:7.0.2:::::::* cpe:2.3:o:fortinet:fortios:7.0.3:::::::* cpe:2.3:o:fortinet:fortios:7.0.4:::::::* cpe:2.3:o:fortinet:fortios:7.0.5:::::::* cpe:2.3:o:fortinet:fortios:7.0.6:::::::* cpe:2.3:o:fortinet:fortios:7.0.7:::::::* cpe:2.3:o:fortinet:fortios:7.0.8:::::::* cpe:2.3:o:fortinet:fortios:7.0.9:::::::* cpe:2.3:o:fortinet:fortios:7.2.0:::::::* cpe:2.3:o:fortinet:fortios:7.2.10:::::::* cpe:2.3:o:fortinet:fortios:7.2.11:::::::* cpe:2.3:o:fortinet:fortios:7.2.12:::::::* cpe:2.3:o:fortinet:fortios:7.2.13:::::::* cpe:2.3:o:fortinet:fortios:7.2.1:::::::* cpe:2.3:o:fortinet:fortios:7.2.2:::::::* cpe:2.3:o:fortinet:fortios:7.2.3:::::::* cpe:2.3:o:fortinet:fortios:7.2.4:::::::* cpe:2.3:o:fortinet:fortios:7.2.5:::::::* cpe:2.3:o:fortinet:fortios:7.2.6:::::::* cpe:2.3:o:fortinet:fortios:7.2.7:::::::* cpe:2.3:o:fortinet:fortios:7.2.8:::::::* cpe:2.3:o:fortinet:fortios:7.2.9:::::::* cpe:2.3:o:fortinet:fortios:7.4.0:::::::* cpe:2.3:o:fortinet:fortios:7.4.1:::::::* cpe:2.3:o:fortinet:fortios:7.4.2:::::::* cpe:2.3:o:fortinet:fortios:7.4.3:::::::* cpe:2.3:o:fortinet:fortios:7.4.4:::::::* cpe:2.3:o:fortinet:fortios:7.4.5:::::::* cpe:2.3:o:fortinet:fortios:7.4.6:::::::* cpe:2.3:o:fortinet:fortios:7.4.7:::::::* cpe:2.3:o:fortinet:fortios:7.4.8:::::::* cpe:2.3:o:fortinet:fortios:7.6.0:::::::* cpe:2.3:o:fortinet:fortios:7.6.1:::::::* cpe:2.3:o:fortinet:fortios:7.6.2:::::::* cpe:2.3:o:fortinet:fortipam:1.0.0:::::::* cpe:2.3:o:fortinet:fortipam:1.0.1:::::::* cpe:2.3:o:fortinet:fortipam:1.0.2:::::::* cpe:2.3:o:fortinet:fortipam:1.0.3:::::::* cpe:2.3:o:fortinet:fortipam:1.1.0:::::::* cpe:2.3:o:fortinet:fortipam:1.1.1:::::::* cpe:2.3:o:fortinet:fortipam:1.1.2:::::::* cpe:2.3:o:fortinet:fortipam:1.2.0:::::::* cpe:2.3:o:fortinet:fortipam:1.3.0:::::::* cpe:2.3:o:fortinet:fortipam:1.3.1:::::::* cpe:2.3:o:fortinet:fortipam:1.4.0:::::::* cpe:2.3:o:fortinet:fortipam:1.4.1:::::::* cpe:2.3:o:fortinet:fortipam:1.4.2:::::::* cpe:2.3:o:fortinet:fortipam:1.4.3:::::::* cpe:2.3:o:fortinet:fortipam:1.5.0:::::::* cpe:2.3:o:fortinet:fortipam:1.5.1:::::::* cpe:2.3:o:fortinet:fortipam:1.6.0:::::::* cpe:2.3:o:fortinet:fortipam:1.6.1:::::::* cpe:2.3:o:fortinet:fortipam:1.6.2:::::::* cpe:2.3:o:fortinet:fortipam:1.7.0:::::::*
Vendors & Products		Fortinet Fortinet fortios Fortinet fortipam Fortinet fortiproxy Fortinet fortiswitchmanager
References		https://fortiguard.fortinet.com/psirt/FG-IR-26-154
Metrics		cvssV3_1 `{'score': 4.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C'}`

Subscriptions

Fortinet Fortios Fortipam Fortiproxy Fortiswitchmanager

MITRE

Status: PUBLISHED

Assigner: fortinet

Published: 2026-07-14T15:19:51.309Z

Updated: 2026-07-16T14:00:37.212Z

Reserved: 2026-07-07T15:21:36.593Z

Link: CVE-2026-59840

Vulnrichment

Updated: 2026-07-14T16:02:35.322Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-07-17T07:15:11Z

Weaknesses

CWE-126

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Subscriptions

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