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CVE-2025-32756: Fortinet Multiple Products Stack-Based Buffer Overflow Vulnerability

97
Patch now
CRITICAL 9.8EXPLOITEDREMOTEUPGRADEUPGRADEUPGRADE

CVE-2025-32756 is a critical-severity flaw (CVSS 9.8) affecting fortimail, fortindr, fortirecorder, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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, FortiRecorde

Why this priority

  • Critical severity
  • EPSS top 2%: very likely to be exploited
  • Exploited in the wild (CISA KEV)
  • Public exploit reference
  • CISA SSVC: automatable with total technical impact
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance30.9% (top 2%)
CISA exploited listYes, fix due 2025-06-04
WeaknessCWE-121, CWE-787
Published2025-05-13
Last modified2026-06-17
Publisher (CNA): Fortinet, Inc. · Vendor: fortinet

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

fortinet fortimail UPGRADE
Affected: >= 7.0.0 and < 7.0.9 · >= 7.2.0 and < 7.2.8 · >= 7.4.0 and < 7.4.5 · >= 7.6.0 and < 7.6.3
Fixed in: 7.0.9, 7.2.8, 7.4.5, 7.6.3
Safe to downgrade to: a release before 7.0.0
1. Check installed version
apt-cache policy fortimail || rpm -q fortimail || fortimail --version
2. UPGRADE to 7.0.9 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade fortimail
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade fortimail
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)
apt-cache madison fortimail sudo apt install fortimail=<VERSION_BEFORE_7.0.0> sudo apt-mark hold fortimail
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fortimail sudo dnf downgrade fortimail-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add fortimail
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
fortinet fortindr UPGRADE
Affected: >= 7.0.0 and < 7.0.7 · >= 7.2.0 and < 7.2.5 · >= 7.4.0 and < 7.4.8 · 1.1.0 · 1.2.0 · 1.3.0 · 1.4.0 · 1.5.0
Fixed in: 7.0.7, 7.2.5, 7.4.8
Safe to downgrade to: a release before 1.1.0
1. Check installed version
apt-cache policy fortindr || rpm -q fortindr || fortindr --version
2. UPGRADE to 7.0.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade fortindr
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade fortindr
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)
apt-cache madison fortindr sudo apt install fortindr=<VERSION_BEFORE_1.1.0> sudo apt-mark hold fortindr
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fortindr sudo dnf downgrade fortindr-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add fortindr
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
fortinet fortirecorder UPGRADE
Affected: >= 6.4.0 and < 6.4.6 · >= 7.0.0 and < 7.0.6 · >= 7.2.0 and < 7.2.4
Fixed in: 6.4.6, 7.0.6, 7.2.4
Safe to downgrade to: a release before 6.4.0
1. Check installed version
apt-cache policy fortirecorder || rpm -q fortirecorder || fortirecorder --version
2. UPGRADE to 6.4.6 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade fortirecorder
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade fortirecorder
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 6.4.0 (Debian / Ubuntu)
apt-cache madison fortirecorder sudo apt install fortirecorder=<VERSION_BEFORE_6.4.0> sudo apt-mark hold fortirecorder
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fortirecorder sudo dnf downgrade fortirecorder-<VERSION_BEFORE_6.4.0> sudo dnf versionlock add fortirecorder
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
fortinet fortivoice UPGRADE
Affected: >= 6.4.0 and < 6.4.11 · >= 7.0.0 and < 7.0.7 · 7.2.0
Fixed in: 6.4.11, 7.0.7
Safe to downgrade to: a release before 6.4.0
1. Check installed version
apt-cache policy fortivoice || rpm -q fortivoice || fortivoice --version
2. UPGRADE to 6.4.11 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade fortivoice
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade fortivoice
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 6.4.0 (Debian / Ubuntu)
apt-cache madison fortivoice sudo apt install fortivoice=<VERSION_BEFORE_6.4.0> sudo apt-mark hold fortivoice
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list fortivoice sudo dnf downgrade fortivoice-<VERSION_BEFORE_6.4.0> sudo dnf versionlock add fortivoice
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
fortinet forticamera firmware UPGRADE
Affected: >= 2.0.0 and <= 2.1.3 · >= 1.1.0 and <= 1.1.5
Fixed in: newer than 2.1.3
Safe to downgrade to: a release before 1.1.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

Fedora ELN · fips-provider-next · FIXED · 1.5.3-3.eln159 · FEDORA-2026-3ce99ec7df · source
sudo dnf upgrade --advisory=FEDORA-2026-3ce99ec7df
Fedora 46 · rubygem-webmock · FIXED · 3.26.1-3.fc46 · FEDORA-2026-bb57b4d095 · source
sudo dnf upgrade --advisory=FEDORA-2026-bb57b4d095

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Advisories and coverage

Official advisories

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-32756?

fortimail: upgrade to 7.0.9, 7.2.8, 7.4.5, 7.6.3; fortindr: upgrade to 7.0.7, 7.2.5, 7.4.8; fortirecorder: upgrade to 6.4.6, 7.0.6, 7.2.4. Exact commands for each OS are on this page.

Is CVE-2025-32756 being exploited?

Yes. CVE-2025-32756 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2025-32756 affect?

CVE-2025-32756 affects fortimail, fortindr, fortirecorder. Severity is critical (CVSS 9.8). 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, Forti

How urgent is CVE-2025-32756?

Priority 97/100. Critical severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Fortinet vulnerabilities

Related CVEs

References

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