Actively exploitedCVSS 5.9 · MEDIUM

CVE-2025-68686Fortinet FortiOS Patch Bypass via Symbolic Link Persistency

Fortinet FortiOS contains an exposure of sensitive information to an unauthorized actor vulnerability. This may allow a remote unauthenticated attacker to bypass the patch developed for the symbolic link persistency mechanism observed in some post-exploit cases, via crafted HTTP requests. An attacker would need first to have compromised the product via another vulnerability, at filesystem level.

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Analysis

Esta vulnerabilidad en Fortinet FortiOS permite a un atacante remoto no autenticado evadir los parches de seguridad para persistencia mediante enlaces simbolicos. El fallo esta siendo explotado activamente en ataques reales y requiere que el sistema haya sido comprometido previamente a nivel de sistema de archivos. Es fundamental que quienes administran infraestructura de red actualicen sus firewalls para evitar que atacantes mantengan acceso persistente.

Relevant roles

CyberSecurityCloudLinux

Severity

Score: 5.9(MEDIUM)

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

AV: NETWORK

AC: HIGH

PR: NONE

UI: NONE

S: UNCHANGED

C: HIGH

I: NONE

A: NONE

Weakness (CWE): CWE-200

CISA KEV

Added to KEV: 2026-07-27

Federal patch deadline: 2026-08-10

Known ransomware use: Unknown

Required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

EPSS

Probability of exploitation (next 30 days): 0.0048 (0.5%)

Percentile: 38.5%

EPSS: 2026-07-27

Affects

fortinet:fortios

Technical description

An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.1, FortiOS 7.4.0 through 7.4.6, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions may allow a remote unauthenticated attacker to bypass the patch developed for the symbolic link persistency mechanism observed in some post-exploit cases, via crafted HTTP requests. An attacker would need first to have compromised the product via another vulnerability, at filesystem level.

Published: 2/10/2026, 4:16:09 PM

Last modified: 6/17/2026, 9:59:25 AM

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-934

How to read this card

Actively exploited

KEV (Known Exploited Vulnerabilities) is CISA's catalog of CVEs confirmed as actively exploited in the real world. If a CVE is on KEV, someone is already using it in attacks.

CVSS 10.0

CVSS 10.0 — máxima severidad teórica. Explotable de forma remota, sin privilegios, con impacto total. Aún no confirmada como explotada en el mundo real, pero parchea ya.

AI-recommended

Un modelo de lenguaje revisó el CVE y consideró que afecta a software ampliamente desplegado o herramientas comunes de desarrollo. Un humano del equipo aprobó la publicación antes de que llegara aquí.

Categorías de impacto que evalúa la IA

widely_deployed_infra — kernel Linux, OpenSSL, glibc, k8s, Docker, nginx, OpenSSH.

popular_dev_tooling — Node.js, Python, Go, React, Next.js, librerías comunes de npm/pip.

common_consumer_software — Chrome, Firefox, Windows, macOS, apps móviles populares.

enterprise_saas — GitHub, GitLab, Atlassian, Salesforce, Cisco, Fortinet, Ivanti.

niche_software — CMS regionales, herramientas de hobby, librerías de poco uso.

not_relevant — firmware específico de proveedor, software descontinuado.

EPSS — EPSS (Exploit Prediction Scoring System) by FIRST.org estimates the probability that a CVE will be exploited in the next 30 days. Range is 0 to 1; very fresh CVEs typically score low until evidence accumulates.