Background exploitation KEV catalog No authentication

CVE-2025-32756

Fortinet Multiple Products Stack-Based Buffer Overflow Vulnerability

CheckOps priority index

7.2/10 Patch within 7 days

Severity9.6

Probability3.1

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 30.9% higher than 98.3% of CVEs

CVSS 3.1 9.6 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 538 days 14 May 2025

CISA due date 04 Jun 2025 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)14 May 2025
Exploited in EUVD (ENISA)14 May 2025
Used by ransomwareno
EPSS above 10 %30.9%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

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

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

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.

Affected products

FortiCameraFortiNDRFortiMailFortiVoiceFortiRecorderMultiple Products

Affected versions

1.1.0 ≤1.1.5
2.1.0 ≤2.1.3
7.6.0
2.0.0
1.5.0 ≤1.5.3
7.6.0 ≤7.6.2
7.2.0 ≤7.2.4
7.0.0 ≤7.0.6
1.2.0
7.2.0 ≤7.2.7
6.4.0 ≤6.4.10
7.4.0 ≤7.4.4

Weaknesses (CWE)

CWE-124

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

13 May 2025
Published
14 May 2025
Exploitation reported (ENISA)
14 May 2025
Added to the KEV catalog
04 Jun 2025
CISA remediation due date
20 Oct 2026
EPSS peak: 30.9%

References

Other exploited vulnerabilities from the same vendor

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CVE-2026-104286Fortinet FortiMail Path Traversal Vulnerability
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4.9 · Actively exploited
CVE-2025-68686Fortinet FortiOS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
5.4 · Actively exploited
CVE-2026-39808Fortinet FortiSandbox OS Command Injection Vulnerability
8.8 · Actively exploited
CVE-2026-25089Fortinet FortiSandbox OS Command Injection Vulnerability
8.3 · Actively exploited