CVE-2026-71407 - Vulnerability Details

Description

A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 may allow an unauthenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, only if the explicit proxy is configured with Kerberos authentication and SOCKS enabled.

Published: 2026-08-12

Score: 5.1 Medium

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

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
`7.6.1`	affected	≤ 7.6.6

Fortinet

FortiPAM

unaffected

Version	Status	Constraints
`1.8.0`	affected	≤ 1.8.4
`1.7.0`	affected	≤ 1.7.2
`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

FortiProxy

unaffected

Version	Status	Constraints
`7.6.0`	affected	≤ 7.6.4
`7.4.0`	affected	≤ 7.4.11
`7.2.0`	affected	≤ 7.2.16
`7.0.0`	affected	≤ 7.0.23

No data.

Vendor Product Confidence Versions

Fortinet

Fortios

100%

Version	Status	Scheme	Platform
`[7.6.1,7.6.6]`	affected	semver	—

Fortinet

Fortipam

100%

Version	Status	Scheme	Platform
`1.2.0`	affected	semver	—
`[1.8.0,1.8.4]`	affected	semver	—
`[1.7.0,1.7.2]`	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	—
`[1.1.0,1.1.2]`	affected	semver	—
`[1.0.0,1.0.3]`	affected	semver	—

Fortinet

Fortiproxy

100%

Version	Status	Scheme	Platform
`[7.6.0,7.6.4]`	affected	semver	—
`[7.4.0,7.4.11]`	affected	semver	—
`[7.2.0,7.2.16]`	affected	semver	—
`[7.0.0,7.0.23]`	affected	semver	—

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Remediation

Vendor Solution

Upgrade to FortiOS version 8.0.0 or above Upgrade to FortiOS version 7.6.7 or above

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://fortiguard.fortinet.com/psirt/FG-IR-26-161

History

Wed, 12 Aug 2026 15:30:00 +0000

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

Wed, 12 Aug 2026 12:30:00 +0000

Type	Values Removed	Values Added
Description		A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 may allow an unauthenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, only if the explicit proxy is configured with Kerberos authentication and SOCKS enabled.
First Time appeared		Fortinet Fortinet fortios Fortinet fortipam Fortinet fortiproxy
Weaknesses		CWE-121
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:7.4.1:::::::* 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:o:fortinet:fortios:7.6.1:::::::* cpe:2.3:o:fortinet:fortios:7.6.2:::::::* cpe:2.3:o:fortinet:fortios:7.6.3:::::::* cpe:2.3:o:fortinet:fortios:7.6.4:::::::* cpe:2.3:o:fortinet:fortios:7.6.5:::::::* cpe:2.3:o:fortinet:fortios:7.6.6:::::::* 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:::::::* cpe:2.3:o:fortinet:fortipam:1.7.1:::::::* cpe:2.3:o:fortinet:fortipam:1.7.2:::::::* cpe:2.3:o:fortinet:fortipam:1.8.0:::::::* cpe:2.3:o:fortinet:fortipam:1.8.1:::::::* cpe:2.3:o:fortinet:fortipam:1.8.2:::::::* cpe:2.3:o:fortinet:fortipam:1.8.3:::::::* cpe:2.3:o:fortinet:fortipam:1.8.4:::::::*
Vendors & Products		Fortinet Fortinet fortios Fortinet fortipam Fortinet fortiproxy
References		https://fortiguard.fortinet.com/psirt/FG-IR-26-161
Metrics		cvssV3_1 `{'score': 5.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}`

Subscriptions

Fortinet Fortios Fortipam Fortiproxy

MITRE

Status: PUBLISHED

Assigner: fortinet

Published: 2026-08-12T12:19:02.684Z

Updated: 2026-08-12T14:17:27.100Z

Reserved: 2026-08-06T12:21:12.061Z

Link: CVE-2026-71407

Vulnrichment

Updated: 2026-08-12T14:17:24.321Z

NVD

Status : Received

Published: 2026-08-12T13:17:25.497

Modified: 2026-08-12T15:18:30.190

Link: CVE-2026-71407

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-12T18:15:02Z

Weaknesses

CWE-121
Stack-based Buffer Overflow

Tracking

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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