CVE-2025-25248 Integer overflow in FortiOS

What is CVE-2025-25248?

CVE-2025-25248 is a medium-severity vulnerability in Fortinet Fortios, published on 12 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An Integer Overflow or Wraparound vulnerability [CWE-190] in FortiOS version 7.6.2 and below, version 7.4.7 and below, version 7.2.10 and below, 7.2 all versions, 6.4 all versions, FortiProxy version 7.6.2 and below, version 7.4.3 and below, 7.2 all versions, 7.0 all versions, 2.0 all versions and FortiPAM version 1.5.0, version 1.4.2 and below, 1.3 all versions, 1.2 all versions, 1.1 all versions, 1.0 all versions SSL-VPN RDP and VNC bookmarks may allow an authenticated user to affect the device SSL-VPN availability via crafted requests.

Weakness: CWE-190

Which versions are affected by CVE-2025-25248?

It affects 3 products.

Products include Fortinet Fortios, Fortinet Fortipam, Fortinet Fortiproxy.

How do I fix CVE-2025-25248?

No fix has been published for CVE-2025-25248 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-25248 being exploited?

There is no known exploitation of CVE-2025-25248 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f257-v2jp-hg34.