CVE-2026-71407
Fortinet FortiOS Stack-based Buffer Overflow
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.
INFO
Published Date :
Aug. 12, 2026, 1:17 p.m.
Last Modified :
Aug. 12, 2026, 1:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-71407
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 6abe59d8-c742-4dff-8ce8-9b0ca1073da8 | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update FortiOS to a version later than 7.6.6.
- Disable Kerberos authentication if explicit proxy is used.
- Disable SOCKS if explicit proxy is used.
- Apply vendor patches when available.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-71407.
| URL | Resource |
|---|---|
| https://fortiguard.fortinet.com/psirt/FG-IR-26-161 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-71407 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-71407
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-71407 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-71407 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:o:fortinet:fortios:7.6.6:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortios:7.6.5:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortios:7.6.4:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortios:7.6.3:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortios:7.6.2:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortios:7.6.1:*:*:*:*:*:*:*'], 'vendor': 'Fortinet', 'product': 'FortiOS', 'versions': [{'status': 'affected', 'version': '7.6.1', 'versionType': 'semver', 'lessThanOrEqual': '7.6.6'}], 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:2.3:o:fortinet:fortipam:1.8.4:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.8.3:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.8.2:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.8.1:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.8.0:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.7.2:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.7.1:*:*:*:*:*:*:*', 'cpe:2.3:o:fortinet:fortipam:1.7.0:*:*:*:*:*:*:*', 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'product': 'FortiPAM', 'versions': [{'status': 'affected', 'version': '1.8.0', 'versionType': 'semver', 'lessThanOrEqual': '1.8.4'}, {'status': 'affected', 'version': '1.7.0', 'versionType': 'semver', 'lessThanOrEqual': '1.7.2'}, {'status': 'affected', 'version': '1.6.0', 'versionType': 'semver', 'lessThanOrEqual': '1.6.2'}, {'status': 'affected', 'version': '1.5.0', 'versionType': 'semver', 'lessThanOrEqual': '1.5.1'}, {'status': 'affected', 'version': '1.4.0', 'versionType': 'semver', 'lessThanOrEqual': '1.4.3'}, {'status': 'affected', 'version': '1.3.0', 'versionType': 'semver', 'lessThanOrEqual': '1.3.1'}, {'status': 'affected', 'version': '1.2.0'}, {'status': 'affected', 'version': '1.1.0', 'versionType': 'semver', 'lessThanOrEqual': '1.1.2'}, {'status': 'affected', 'version': '1.0.0', 'versionType': 'semver', 'lessThanOrEqual': '1.0.3'}], 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:2.3:a:fortinet:fortiproxy:7.6.4:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.6.3:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.6.2:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.6.1:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.6.0:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.11:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.10:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.9:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.8:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.7:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.6:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.5:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.4:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.3:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.2:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.1:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.4.0:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.16:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.15:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.14:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.13:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.12:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.11:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.10:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.9:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.8:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.7:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.6:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.5:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.4:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.3:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.2:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.1:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.2.0:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.23:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.22:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.21:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.20:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.19:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.18:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.17:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.16:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.15:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.14:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.13:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.12:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.11:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.10:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.9:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.8:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.7:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.6:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.5:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.4:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.3:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.2:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.1:*:*:*:*:*:*:*', 'cpe:2.3:a:fortinet:fortiproxy:7.0.0:*:*:*:*:*:*:*'], 'vendor': 'Fortinet', 'product': 'FortiProxy', 'versions': [{'status': 'affected', 'version': '7.6.0', 'versionType': 'semver', 'lessThanOrEqual': '7.6.4'}, {'status': 'affected', 'version': '7.4.0', 'versionType': 'semver', 'lessThanOrEqual': '7.4.11'}, {'status': 'affected', 'version': '7.2.0', 'versionType': 'semver', 'lessThanOrEqual': '7.2.16'}, {'status': 'affected', 'version': '7.0.0', 'versionType': 'semver', 'lessThanOrEqual': '7.0.23'}], 'defaultStatus': 'unaffected'}] 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Added CWE CWE-121 Added Reference https://fortiguard.fortinet.com/psirt/FG-IR-26-161