CVE-2025-32756

Fortinet Multiple Products: Stack-Based Buffer Overflow

As of , CVE-2025-32756 in Fortinet Multiple Products is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 14 May 2025
US federal deadline
4 June 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.30Higher than 98% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: fortiguard.fortinet.comLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA's required action

What the flaw is

Fortinet FortiFone, FortiVoice, FortiNDR and FortiMail contain a stack-based overflow vulnerability that may allow a remote unauthenticated attacker to execute arbitrary code or commands via crafted HTTP requests.

CISA's description

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 all versions, FortiMail 7.6.0 through 7.6.2, FortiMail 7.4.0 through 7.4.4, FortiMail 7.2.0 through 7.2.7, FortiMail 7.0.0 through 7.0.8, FortiNDR 7.6.0, FortiNDR 7.4.0 through 7.4.7, FortiNDR 7.2.0 through 7.2.4, FortiNDR 7.0.0 through 7.0.6, FortiRecorder 7.2.0 through 7.2.3, FortiRecorder 7.0.0 through 7.0.5, FortiRecorder 6.4.0 through 6.4.5, FortiVoice 7.2.0, FortiVoice 7.0.0 through 7.0.6, FortiVoice 6.4.0 through 6.4.10 allows a remote unauthenticated attacker to execute arbitrary code or commands via sending HTTP requests with specially crafted hash cookie.

The CVE record's description, from fortinet

CVE published
13 May 2025
Assigned by
fortinet
CVSS
9.6 Critical (CVSS 3.1, from the CNA)
CWE-121
Stack-based Buffer Overflow
CWE-124
Buffer Underwrite ('Buffer Underflow')
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Multiple Products: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2025-25249Heap-based Buffer OverflowFortinet Multiple ProductsPatch nowForensic triage required by CISA0.04
CVE-2022-40684Authentication BypassFortinet Multiple ProductsPatch this weekRansomware use; Metasploit module; EPSS 0.990.99
CVE-2026-24858Authentication Bypass Using an Alternate Path or ChannelFortinet Multiple ProductsPatch this weekEPSS 0.860.86
CVE-2025-59718Improper Verification of Cryptographic SignatureFortinet Multiple ProductsPatch this weekEPSS 0.680.68
CVE-2024-23113Format StringFortinet Multiple ProductsPatch this weekEPSS 0.620.62

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