CVE-2026-22572
📋 TL;DR
This CVE describes an authentication bypass vulnerability in Fortinet FortiAnalyzer and FortiManager products (both on-premises and cloud versions). Attackers who know an admin password can bypass multi-factor authentication by sending multiple specially crafted requests. This affects multiple versions of these security management platforms.
💻 Affected Systems
- FortiAnalyzer
- FortiAnalyzer Cloud
- FortiManager
- FortiManager Cloud
📦 What is this software?
Fortianalyzer by Fortinet
Fortianalyzer by Fortinet
Fortimanager by Fortinet
Fortimanager by Fortinet
⚠️ Risk & Real-World Impact
Worst Case
An attacker with knowledge of admin credentials could gain full administrative access to FortiAnalyzer/FortiManager systems, potentially compromising the entire security management infrastructure and accessing sensitive log data.
Likely Case
Attackers with stolen or guessed admin credentials bypass MFA protections to gain unauthorized administrative access to security management systems.
If Mitigated
With proper MFA enforcement and credential protection, the attack surface is significantly reduced, though the vulnerability still exists in the software.
🎯 Exploit Status
Requires knowledge of admin credentials and ability to send multiple crafted requests; no public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: FortiAnalyzer/FortiManager 7.6.4, 7.4.8, 7.2.12 and later; FortiAnalyzer Cloud/FortiManager Cloud 7.6.4, 7.4.8, 7.2.11 and later
Vendor Advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-090
Restart Required: Yes
Instructions:
1. Backup configuration. 2. Download appropriate firmware version from Fortinet support portal. 3. Upload firmware to device. 4. Install update via GUI or CLI. 5. Reboot device. 6. Verify version and functionality.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit admin account access to trusted IP addresses only
config system admin
edit admin
set trusthost1 <trusted_ip> <trusted_mask>
end
Enforce Strong Password Policies
allImplement complex password requirements and regular rotation for admin accounts
config system password-policy
set status enable
set apply-to admin
set minimum-length 12
set change-4-characters enable
end
🧯 If You Can't Patch
- Implement network segmentation to restrict access to FortiAnalyzer/FortiManager management interfaces
- Enable detailed logging and monitoring for authentication attempts and admin access patterns
🔍 How to Verify
Check if Vulnerable:
Check current version via GUI (System > Dashboard) or CLI (get system status) and compare with affected versions listCheck Version:
get system status | grep VersionVerify Fix Applied:
Verify version is 7.6.4+, 7.4.8+, or 7.2.12+ for on-premises; 7.6.4+, 7.4.8+, or 7.2.11+ for cloud📡 Detection & Monitoring
Log Indicators:
- Multiple failed MFA attempts followed by successful admin login
- Admin logins from unusual IP addresses without MFA prompts
- Consecutive authentication requests in short timeframes
Network Indicators:
- Multiple HTTP POST requests to authentication endpoints from single source
- Unusual authentication traffic patterns to management interfaces
SIEM Query:
source="fortianalyzer" OR source="fortimanager" (event_type="authentication" AND (result="success" OR result="failure") AND user="admin") | stats count by src_ip, user, result | where count > 5