Vulnerability · CVE-2026-71407
Stack buffer overflow in WAD
Published Aug 12, 2026 · corrected/updated Oct 15, 2026 · Fortinet FortiOS · evidence confidence high
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.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-71407 is a high public vulnerability record for Fortinet FortiOS. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether Fortinet FortiOS is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: fortinet/fortios; Fortinet FortiOS; Fortinet FortiPAM; Fortinet FortiProxy. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 8.1, EPSS 0.5%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-121. Sources contributing to this record: circl, cve_org, epss, fortinet. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Aug 12, 2026 · NIST NVD
Detected
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.
Oct 15, 2026 · NIST NVD
Updated
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.
Affected
- cpe fortinet/fortiosversion unspecified
- vendor Fortinet FortiOSversion unspecified
- vendor Fortinet FortiPAMversion unspecified
- vendor Fortinet FortiProxyversion unspecified
Sources
- CIRCL Vulnerability LookupVulnerability recordCVE-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 attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, o
vulnerability.circl.lu - CVE.orgVulnerability recordCVE-2026-71407
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-71407
30-day exploitation probability 0.5%
first.org - Fortinet PSIRTVendor advisoryCVE-2026-71407
CVE-2026-71407 is named in a Fortinet PSIRT advisory.
filestore.fortinet.com - NIST NVDVulnerability recordCVE-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 attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, o
nvd.nist.gov