Vulnerability in Fortinet FortiClientWindows (CVE-2026-84386)
Summary
Vulnerability in Fortinet FortiClientWindows (CVE-2026-84386). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
A unverified ownership vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.7, FortiClientWindows 7.2 all versions may allow attacker to improper access control via
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-84386 has been found in Fortinet FortiClientWindows.
Risk of unauthorized operations or information disclosure. CVSS score: 5.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Fortinet FortiClientWindows CVE-2026-84386" on the vendor's site.
CVE-2026-84386 (Fortinet FortiClientWindows) — CWE-283 / CVSS v3 5.1
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-283) exists in Fortinet FortiClientWindows.
Check the vendor advisory for the affected versions of Fortinet FortiClientWindows.
Severity: Medium (CVSS 5.1/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Fortinet FortiClientWindows を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web fortiguard.fortinet.com
- web nvd.nist.gov
- web github.com