CVE-2022-40684: Fortinet FortiOS Authentication Bypass
Summary
Fortinet FortiOS allows authentication bypass via crafted HTTP requests targeting the API, enabling admin access.
Why It Matters
CRITICAL severity — known to be exploited in the wild（CISA KEV）；action required: Apply updates per vendor instructions. ；affects Fortinet FortiOS 7.0.0 to 7.0.6, FortiOS 7.2.0 to 7.2.2, FortiProxy 2.0.0 to 2.0.8 and more.
Current Status
- Vulnerability status: Known exploited (CISA KEV)
- Last intelligence update: 2026-10-27 · source: NVD
- CISA KEV added: 2022-10-11 · remediation deadline: 2022-11-01
Entity Activity Timeline
- 2022-10-11 — Added to CISA KEV as known-exploited · action: Apply updates per vendor instructions.
- 2022-10-10 — NVD publication / disclosure
- 2026-10-27 — Intelligence record updated（NVD sync）
Severity
CRITICAL
CVSS Score: 9.8
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Known Exploited (CISA KEV)
Known Exploited Vulnerability
Added: 2022-10-11 · Remediation deadline: 2022-11-01
Apply updates per vendor instructions.
Source Attribution
Source: NVD · Updated: 2026-10-27T00:00:00.000 · Confidence: high
Impact
Based on CVSS vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
- Fortinet FortiOS 7.0.0 to 7.0.6 (Unknown)
- FortiOS 7.2.0 to 7.2.2 (Unknown)
- FortiProxy 2.0.0 to 2.0.8 (Unknown)
- FortiProxy 7.0.0 to 7.0.7 (Unknown)
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.
Sources & Evidence
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