Exploited vulnerability · CISA KEV

Is CVE-2022-40684 exploited? Yes: in CISA KEV since 11 Oct 2022

Gociux · Fortinet Multiple Products · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-40684, Fortinet Multiple Products Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 11 Oct 2022. It is known to be used in ransomware campaigns. It affects Fortinet Multiple Products, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

Fortinet FortiOS, FortiProxy, and FortiSwitchManager contain an authentication bypass vulnerability that could allow an unauthenticated attacker to perform operations on the administrative interface via specially crafted HTTP or HTTPS requests.

What to do

1. Check whether you run it. Look for Multiple Products in your asset inventory, including appliances and cloud images. Stack check lists every exploited Fortinet CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 18 Oct 2022.
4. Get told next time. Email alerts when CISA adds a CVE for Fortinet.

Other exploited CVEs in Multiple Products

• CVE-2025-61624: Fortinet Multiple Products Path Traversal Vulnerability (16 Oct 2026)
• CVE-2025-25249: Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability (9 Sep 2026)
• CVE-2026-24858: Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability (27 Jan 2026)
• CVE-2025-59718: Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability (16 Dec 2025)
• CVE-2025-32756: Fortinet Multiple Products Stack-Based Buffer Overflow Vulnerability (14 May 2025)
• CVE-2024-23113: Fortinet Multiple Products Format String Vulnerability (9 Oct 2024)

References

• www.fortiguard.com/psirt/FG-IR-22-377
• nvd.nist.gov/vuln/detail/CVE-2022-40684

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in October 2022 · Fortinet scorecard · act-now radar.