CVE-2025-32756: Fortinet Multiple Products Vulnerability

What is CVE-2025-32756?

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.

Impact Analysis

Exploitation Probability (EPSS): 22.3% chance of exploitation in the next 30 days (96th percentile). This is a significantly elevated exploitation probability — prioritize patching.

Exploit Availability

Public exploit code or proof-of-concept is available for CVE-2025-32756. This significantly increases the risk of exploitation, as attackers can use or adapt existing exploit code rather than developing their own. A public exploit reference has been identified. Organizations should treat this as an urgent patching priority.

Is CVE-2025-32756 being exploited?

Yes. CVE-2025-32756 is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, restricted to CVEs with confirmed active exploitation in the wild. CISA added this vulnerability on 2025-05-14. Inclusion in KEV triggers the patching mandate under BOD 22-01 for U.S. federal civilian agencies, with a remediation deadline of 2025-06-04. Additionally, public exploit code is available, which lowers the barrier for attackers.

How to fix CVE-2025-32756

Upgrade FortiOS or the affected product firmware to the fixed version listed in the FortiGuard PSIRT advisory. For FortiGate devices, use the firmware upgrade path tool to determine the correct upgrade sequence. If immediate patching is not possible, apply the recommended workaround (e.g. disabling affected features, restricting management interface access). Check the Fortinet PSIRT Advisories page for the specific patch or update. CISA's Known Exploited Vulnerabilities catalog requires U.S. federal agencies to remediate this vulnerability by the due date shown below under Binding Operational Directive 22-01. Private organizations should treat KEV entries as priority-one patches because active exploitation has been confirmed in the wild.

Related Vulnerabilities

Other actively exploited vulnerabilities affecting Multiple Products:

• CVE-2026-24858 (Critical 9.8) [same product] — An Authentication Bypass Using an Alternate Path or Channel vulnerability…
• CVE-2025-59718 (Critical 9.8) [same product] — A improper verification of cryptographic signature vulnerability in Fortinet…
• CVE-2025-43510 (High 7.8) [same product] — A memory corruption issue was addressed with improved lock state checking…
• CVE-2025-43520 (Medium 5.5) [same product] — A memory corruption issue was addressed with improved memory handling. This…
• CVE-2025-31277 (High 8.8) [same product] — The issue was addressed with improved memory handling. This issue is fixed in…

Frequently asked questions

Is CVE-2025-32756 critical?

CVE-2025-32756 has a CVSS 3.1 base score of N/A — Unknown severity. Prioritize based on exposure and the active exploitation signal from the KEV listing. The availability of public exploit code further increases the urgency.

Is CVE-2025-32756 being actively exploited?

Yes — CISA added CVE-2025-32756 to the Known Exploited Vulnerabilities catalog on 2025-05-14. Inclusion in KEV means CISA has confirmed in-the-wild exploitation. Public exploit code has also been identified, making exploitation accessible to a broader range of threat actors.

How do I patch CVE-2025-32756?

Apply the security update from Fortinet for Multiple Products. Federal agencies must remediate by 2025-06-04 under BOD 22-01. Refer to the Fortinet PSIRT Advisories for the official patch.

What is the CVSS score for CVE-2025-32756?

CVE-2025-32756 has a CVSS 3.1 base score of N/A, classifying it as Unknown severity.