HighCISA KEVExploited in the wildPublic exploit

FortiOS/FortiProxy Security Fabric authentication bypass via crafted CSF proxy requests

IdentifiersCVE-2025-24472CWE-288· Authentication Bypass Using an…

CVE-2025-24472 is an authentication bypass vulnerability in Fortinet FortiOS and FortiProxy. It affects FortiOS 7.0.0 through 7.0.16 and FortiProxy 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12. The flaw is classified as Authentication Bypass Using an Alternate Path or Channel (CWE-288). According to the provided advisory content, a remote unauthenticated attacker can send crafted CSF proxy requests and, if Security Fabric is enabled, bypass normal authentication controls and obtain super-admin privileges on the downstream device. Exploitation requires prior knowledge of the upstream and downstream devices' serial numbers. Fortinet advisory context also notes related abuse through crafted Node.js websocket or CSF proxy requests.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows a remote unauthenticated attacker to gain super-admin privileges on the affected downstream FortiOS or FortiProxy device. With super-admin access, an attacker can fully administer the appliance, alter configuration, create or modify administrator and VPN accounts, access configuration backups and secrets, change security policies, and use the device as a foothold for further intrusion into the internal network. The advisory context states this can lead to unauthorized code or command execution and potential compromise of the entire device and connected environment. The vulnerability has been reported as actively exploited in the wild and added to CISA's KEV catalog.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, disable the HTTP/HTTPS administrative interface or strictly restrict administrative interface access with local-in policies to trusted source IP addresses only. As an additional precaution, use non-standard, non-guessable administrator usernames. For this specific CSF-based attack path, disable Security Fabric from the CLI. More broadly, avoid exposing management interfaces to the internet and monitor for suspicious CSF proxy or administrative activity.

Remediation

Patch, then assume compromise.

Upgrade affected products to fixed releases. The provided Fortinet advisory recommends upgrading FortiOS 7.0 to 7.0.17 or later, FortiProxy 7.2 to 7.2.13 or later, and FortiProxy 7.0 to 7.0.20 or later. Follow Fortinet's recommended upgrade path and validate that exposed management interfaces are no longer running vulnerable builds.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

FortinetFortiosoperating_system

FortinetFortiproxyapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

15 SOURCESView more in app

cyber security newsNews

May 22, 2026

Russian Threat Groups Use RDP, VPN, Supply Chain Attacks, and Social Engineering for Initial Access

Fortinet appliance vulnerability exploited for initial access.

nuclei templates pull requestsNews

Apr 4, 2026

Add CVE-2025-24472 - Fortinet FortiOS/FortiProxy Authentication Bypass by ffulbtech · Pull Request #15798 · projectdiscovery/nuclei-templates · GitHub

An authentication bypass vulnerability in Fortinet FortiOS and FortiProxy via CSF proxy requests that can allow a remote attacker to gain super-admin privileges on FortiGate firewalls.

greynoise blogNews

Feb 2, 2026

The Noise in the Silence: Unmasking CISA's Hidden KEV Ransomware Updates

A Fortinet vulnerability that CISA KEV’s knownRansomwareCampaignUse field silently flipped to Known during 2025 (evidence of ransomware campaign use).

hackmageddonNews

Oct 7, 2025

CVEs Targeting Remote Access Technologies in 2025

A zero-day vulnerability in FortiOS and FortiProxy exploited to hijack Fortinet firewalls.

+7 more in the timeline

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence2

Every observed campaign linking this CVE to a named adversary.

Associated malware3

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2025-24472

NVD

nvd.nist.gov/vuln/detail/CVE-2025-24472

MITRE CWE · CWE-288

Authentication Bypass Using an Alternate Path…

Vendor Advisory

fortiguard.fortinet.com/psirt/FG-IR-24-535

US Government Resource

cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24472