CVE-2025-32756KEV · OVERDUECWE-121

Fortinet Multiple Products Stack-Based Buffer Overflow Vulnerability

Critical · published May 13, 2025

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.6. It is confirmed in active exploitation. It sits in the 98.3th percentile for exploit probability.

507
days past CISA
deadline
CVSS v3.1
9.6
EPSS
31%
Percentile
98.3
In the wild
Confirmed
What it is

🚨 A single HTTP request is the key to this stack-based buffer overflow vulnerability, allowing attackers to run arbitrary code on multiple Fortinet products! 🔥 Think of it like a delivery driver who receives a package without checking the address—if they just drop it off without verification, it could end up anywhere! This vulnerability lets malicious payloads slip into systems through an unfiltered request, causing chaos. This vulnerability could be absolutely devastating, allowing remote unauthenticated attackers to execute arbitrary commands. Imagine someone walking right into your server and taking complete control, manipulating data, or even shutting down crucial services. The potential for damage is immense!

Put simply

Think of it like a delivery driver who receives a package without checking the address—if they just drop it off without verification, it could end up anywhere! This vulnerability lets malicious payloads slip into systems through an unfiltered request, causing chaos. CVE-2025-32756 is a stack-based buffer overflow in Fortinet FortiCamera, FortiMail, FortiNDR, FortiRecorder, and FortiVoice appliances. It occurs when specially crafted hash cookies are sent via HTTP requests, leading to arbitrary code execution.

What to do

This vulnerability could be absolutely devastating, allowing remote unauthenticated attackers to execute arbitrary commands. Imagine someone walking right into your server and taking complete control, manipulating data, or even shutting down crucial services. The potential for damage is immense! Patch your systems immediately to the latest versions, including FortiCamera 2.1.4 or later, FortiMail 7.6.3 or later, and others listed in the advisory. Ensure your firewalls are configured to detect and block suspicious HTTP requests. Regularly audit your systems for any unauthorized changes. You've got this! Follow these steps, and you'll secure your systems in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:C
CVSS v4.0
Not supplied
EPSS
0.30944 · 98.3th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2025-05-13T14:46Z
KEV added
2025-05-14 · due 2025-06-04
EPSS history
Timeline
  • 14 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 4
    kev
  • 13 MAY 14:46Z
    A stack-based buffer overflow vulnerability [CWE-121] vulnerability in Fortinet FortiCamera 2.1.0 through 2.1.3, FortiCamera 2.0 all versions, FortiCamera 1.1…
    cvelistv5