CVEs / CVE-2025-32756
CVE-2025-32756: Fortinet Multiple Products Stack-Based Buffer Overflow Vulnerability
- Known exploited in the CISA KEV catalog since 14 May 2025
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 30.9% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Fortinet FortiNDR | 7.6.0 | — |
| Fortinet FortiNDR | from 7.4.0, up to and including 7.4.7 | — |
| Fortinet FortiNDR | from 7.2.0, up to and including 7.2.4 | — |
| Fortinet FortiNDR | from 7.1.0, up to and including 7.1.1 | — |
| Fortinet FortiNDR | from 7.0.0, up to and including 7.0.6 | — |
| Fortinet FortiNDR | from 1.5.0, up to and including 1.5.3 | — |
| Fortinet FortiNDR | 1.4.0 | — |
| Fortinet FortiNDR | from 1.3.0, up to and including 1.3.1 | — |
| Fortinet FortiNDR | 1.2.0 | — |
| Fortinet FortiNDR | 1.1.0 | — |
| Fortinet FortiCamera | from 2.1.0, up to and including 2.1.3 | — |
| Fortinet FortiCamera | 2.0.0 | — |
| Fortinet FortiCamera | from 1.1.0, up to and including 1.1.5 | — |
| Fortinet FortiRecorder | from 7.2.0, up to and including 7.2.3 | — |
| Fortinet FortiRecorder | from 7.0.0, up to and including 7.0.5 | — |
| Fortinet FortiRecorder | from 6.4.0, up to and including 6.4.5 | — |
| Fortinet FortiVoice | 7.2.0 | — |
| Fortinet FortiVoice | from 7.0.0, up to and including 7.0.6 | — |
| Fortinet FortiVoice | from 6.4.0, up to and including 6.4.10 | — |
| Fortinet FortiMail | from 7.6.0, up to and including 7.6.2 | — |
| Fortinet FortiMail | from 7.4.0, up to and including 7.4.4 | — |
| Fortinet FortiMail | from 7.2.0, up to and including 7.2.7 | — |
| Fortinet FortiMail | from 7.0.0, up to and including 7.0.8 | — |
Exploitation
| In CISA KEV since | 14 May 2025 |
|---|---|
| Due date for US federal agencies | 4 Jun 2025 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-121, CWE-787 |
References
- CVE-2025-32756 on NVD
- CVE-2025-32756 in the CISA KEV catalog
- https://fortiguard.fortinet.com/psirt/FG-IR-25-254 (cited by CISA)
- https://fortiguard.fortinet.com/psirt/FG-IR-25-254 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32756 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.