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CVE-2026-71407

A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 m…

Severity
High8.1CVSS 3.1, High
Known exploited
Not listed
Exploit prediction
0.42%
Published
12 Aug 2026Updated 8 Sept 2026 · Last verified 30 Sept 2026

Known remediation

Fixed releases per branch, as the vendor states them. Patcharo never infers a fix.

  • Fortinet FortiOS

    Vendor advisory
    • 7.6Fixed after 7.6.6

  • Fortinet FortiProxy

    Vendor advisory
    • 7.6Fixed after 7.6.4
    • 7.4Fixed after 7.4.11
    • 7.2Fixed after 7.2.16
    • 7.0Fixed after 7.0.23

Workaround / Vendor remediation

Vendor remediation · FortiOS

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

Vendor remediation · FortiProxy

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

Description

Title, description and vendor guidance are quoted from the source records.

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.

Weakness: CWE-121

Known exploited

Not listed in CISA KEV as of the last check.

Exploit prediction

0.42% probability of exploitation in the next 30 days (percentile 34%).

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

What the source states, per branch

Versions matched by Patcharo

Fortinet FortiOSSource: Fortinet (CVE record)

BranchAffectedFixed in
7.6
7.6.1 – 7.6.6
Fixed after 7.6.6

Versions not listed are stated unaffected by the vendor.

Fortinet FortiProxySource: Fortinet (CVE record)

BranchAffectedFixed in
7.6
7.6.0 – 7.6.4
Fixed after 7.6.4
7.4
7.4.0 – 7.4.11
Fixed after 7.4.11
7.2
7.2.0 – 7.2.16
Fixed after 7.2.16
7.0
7.0.0 – 7.0.23
Fixed after 7.0.23

Versions not listed are stated unaffected by the vendor.

Affected products

  • Fortinet FortiPAM · 1.8.0 ≤ 1.8.4, 1.7.0 ≤ 1.7.2, 1.6.0 ≤ 1.6.2, 1.5.0 ≤ 1.5.1, 1.4.0 ≤ 1.4.3, 1.3.0 ≤ 1.3.1, 1.2.0, 1.1.0 ≤ 1.1.2, 1.0.0 ≤ 1.0.3

References

Provenance

Every fact on this page comes from the sources below. Nothing is written by an AI.

Fortinet (CVE record)
Fortinet (CVE record) · 30 Sept 2026 at 00:17 UTC · Parser patcharo-cve5/1.1.0
NVD
NVD · 28 Sept 2026 at 07:02 UTC · Parser patcharo-nvd/1.0.0
FIRST EPSS
FIRST EPSS · 30 Sept 2026 at 00:17 UTC · Parser patcharo-epss/1.0.0

Last verified: 30 Sept 2026 at 00:17 UTC