CVE-2026-24858: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-03-23T21:45:46.322Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.

• Context preserved from previous revision: An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices. Notes: 📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

Technical Details

• CVE: CVE-2026-24858
• KEV date added: 2026-01-27
• KEV due date: 2026-01-30
• NVD published: 2026-01-27
• NVD modified: 2026-01-29
• MITRE modified: 2026-03-23
• CVSS base score: 9.8
• CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• CVSS exploitability score: 3.9
• CVSS impact score: 5.9
• Attack vector: Network
• Attack complexity: Low
• Privileges required: None
• User interaction: None
• Scope: Unchanged
• Confidentiality impact: High
• Integrity impact: High
• Availability impact: High

Versions and Products Impacted

• fortinet / fortianalyzer (versions: >= 7.0.0, <= 7.0.15)
• fortinet / fortianalyzer (versions: >= 7.2.0, <= 7.2.11)
• fortinet / fortianalyzer (versions: >= 7.4.0, < 7.4.10)
• fortinet / fortianalyzer (versions: >= 7.6.0, < 7.6.6)
• fortinet / fortimanager (versions: >= 7.0.0, <= 7.0.15)
• fortinet / fortimanager (versions: >= 7.2.0, <= 7.2.11)
• fortinet / fortimanager (versions: >= 7.4.0, < 7.4.10)
• fortinet / fortimanager (versions: >= 7.6.0, < 7.6.6)
• fortinet / fortiproxy (versions: >= 7.0.0, <= 7.0.22)
• fortinet / fortiproxy (versions: >= 7.2.0, <= 7.2.15)
• fortinet / fortiproxy (versions: >= 7.4.0, <= 7.4.12)
• fortinet / fortiproxy (versions: >= 7.6.0, <= 7.6.4)
• fortinet / fortiweb (versions: >= 7.4.0, <= 7.4.11)
• fortinet / fortiweb (versions: >= 7.6.0, <= 7.6.6)
• fortinet / fortiweb (versions: >= 8.0.0, <= 8.0.3)
• fortinet / fortios (versions: >= 7.0.0, <= 7.0.18)
• fortinet / fortios (versions: >= 7.2.0, <= 7.2.12)
• fortinet / fortios (versions: >= 7.4.0, < 7.4.11)
• fortinet / fortios (versions: >= 7.6.0, < 7.6.6)
• Fortinet / FortiOS (versions: 7.6.0, 7.4.0, 7.2.0, 7.0.0)

Weakness Classification

• CWE-288

Repositories for Lab Validation (Public Examples)

• nomi-sec/PoC-in-GitHub | stars: 7594 | updated: 2026-03-23 | https://github.com/nomi-sec/PoC-in-GitHub
  Notes: 📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
• DarkFunct/TK-CVE-Repo | stars: 43 | updated: 2026-03-23 | https://github.com/DarkFunct/TK-CVE-Repo
  Notes: TK-CVE-Repo
• Leviticus-Triage/llm-honeypot-intelligence | stars: 3 | updated: 2026-03-13 | https://github.com/Leviticus-Triage/llm-honeypot-intelligence
  Notes: Distributed honeypot intelligence platform with LLM-powered adaptive deception, RL engagement scoring, automated SIEM rule generation (Suricata/Sigma/YARA), ML anomaly detection, and C2/covert channel detection. 55M+ events from 22K+ IPs across 122 countries. Rules auto-synced every 6h.
• kpong1941/Security-Runbook | stars: 0 | updated: 2026-02-16 | https://github.com/kpong1941/Security-Runbook
  Notes: Security Runbooks

People and Organizations Mentioned

• fortinet
• Multiple Products
• nomi-sec
• DarkFunct
• Leviticus-Triage
• kpong1941

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Replicate fortinet / fortianalyzer (versions: >= 7.0.0, <= 7.0.15) authentication flow in a lab tenant and verify MFA + conditional access controls.
4. Test fallback login paths and remove legacy or insecure authentication methods.
5. Alert on impossible travel, privilege spikes, and abnormal API login patterns.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2026-24858
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24858
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: Please adhere to Fortinet's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Fortinet products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://fortiguard.fortinet.com/psirt/FG-IR-26-060 ; https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios ; https://nvd.nist.gov/vuln/detail/CVE-2026-24858
• https://fortiguard.fortinet.com/psirt/FG-IR-26-060
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-24858
• https://www.fortinet.com/blog/psirt-blogs/analysis-of-sso-abuse-on-fortios
• Repository example: https://github.com/nomi-sec/PoC-in-GitHub
• Repository example: https://github.com/DarkFunct/TK-CVE-Repo
• Repository example: https://github.com/Leviticus-Triage/llm-honeypot-intelligence
• Repository example: https://github.com/kpong1941/Security-Runbook

This content is for defensive security training and authorized validation only.