# CVE-2023-36640 — Fortinet FortiPAM

> As of 2026-06-12, CVE-2023-36640 is a MEDIUM-severity vulnerability in Fortinet FortiPAM, CVSS v3.1 6.5, EPSS 0.2% (18.6th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-36640, most recently “Multiple Fortinet FortiOS Vulnerabilities (incl. CVE-2024-23113) Affect Siemens RUGGEDCOM APE1808 via Bundled Fortinet NGFW < V7.4.3 (SSA-832273)”.

**Last updated:** 2026-06-12

## What is CVE-2023-36640?

A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.4.0, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiOS 6.2 all versions, FortiOS 6.0.0 through 6.0.16, FortiPAM 1.1.0, FortiPAM 1.0 all versions, FortiProxy 7.2.0 through 7.2.5, FortiProxy 7.0.0 through 7.0.11, FortiProxy 2.0 all versions, FortiProxy 1.2 all versions, FortiProxy 1.1 all versions, FortiProxy 1.0 all versions allows attacker to execute unauthorized code or commands via specially crafted commands

The record classifies CVE-2023-36640 under weakness class [CWE-134](https://cwe.mitre.org/data/definitions/134.html). Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 892 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 18.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2024-05-14, last modified 2026-06-12

## Is CVE-2023-36640 being exploited?

It currently carries a trending score of 10 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Fortinet](https://intel.threadlinqs.com/vendors/fortinet): FortiPAM, FortiProxy, FortiOS

## How to fix CVE-2023-36640

No vendor patch reference has been recorded for CVE-2023-36640 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2023-36640

1 tracked threat in the Threadlinqs corpus references CVE-2023-36640, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Multiple Fortinet FortiOS Vulnerabilities (incl. CVE-2024-23113) Affect Siemens RUGGEDCOM APE1808 via Bundled Fortinet NGFW < V7.4.3 (SSA-832273)](https://intel.threadlinqs.com/threat/TL-2026-2489) — CRITICAL · 2026-09-13

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [fortiguard.com](https://fortiguard.com/psirt/FG-IR-23-137)

Canonical: https://intel.threadlinqs.com/cve/CVE-2023-36640
Full detection coverage and IOCs for threats exploiting CVE-2023-36640 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp