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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 may allow an unauthenticated…

Medium5.1EPSS 0.51%
Published
Updated
Reserved
Assigned by
fortinet

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.

Scores

CVSS scores of CVE-2026-71407, by who scored it
Scored byCVSSScoreVector
fortinetCNA (assigner)3.1Medium5.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
NVDNVD · Modified3.1High8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.51% · top 56% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.1.

Weakness

Affected products

What to do

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

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .