How severe is CVE-2025-46373?

CVE-2025-46373 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-46373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-46373?

CVE-2025-46373 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-46373?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-46373 have an EU (EUVD) identifier?

Yes. CVE-2025-46373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198018.

When was CVE-2025-46373 published?

CVE-2025-46373 was published on 2025-11-18 and last updated on 2026-06-17.

CVE-2025-46373

CVE-2025-46373 is a high-severity vulnerability in Fortinet Forticlient with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198018
Weakness: CWE-122
Affected product: Fortinet Forticlient
Published: 2025-11-18
Last modified: 2026-06-17

Description

A Heap-based Buffer Overflow vulnerability [CWE-122] vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.2.0 through 7.2.8 may allow an authenticated local IPSec user to execute arbitrary code or commands via "fortips_74.sys". The attacker would need to bypass the Windows heap integrity protections

Frequently asked questions

What is CVE-2025-46373?: A Heap-based Buffer Overflow vulnerability [CWE-122] vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.2.0 through 7.2.8 may allow an authenticated local IPSec user to execute arbitrary code or commands via "fortips_74.sys". The attacker would need to bypass the Windows heap integrity protections
How severe is CVE-2025-46373?: CVE-2025-46373 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-46373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-46373?: CVE-2025-46373 affects Fortinet Forticlient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-46373?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-46373 have an EU (EUVD) identifier?: Yes. CVE-2025-46373 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198018.
When was CVE-2025-46373 published?: CVE-2025-46373 was published on 2025-11-18 and last updated on 2026-06-17.

References

https://fortiguard.fortinet.com/psirt/FG-IR-25-125

Affected products (1)

cpe:2.3:a:fortinet:forticlient:*:*:*:*:*:windows:*:*

More vulnerabilities in Fortinet Forticlient

CVE-2019-17658 — Critical (CVSS 9.8): An unquoted service path vulnerability in the FortiClient FortiTray component of FortiClientWindows v6.2.2 and prior…
CVE-2023-45590 — Critical (CVSS 9.6): An improper control of generation of code ('code injection') in Fortinet FortiClientLinux version 7.2.0, 7.0.6 through…
CVE-2020-15934 — High (CVSS 8.8): An execution with unnecessary privileges vulnerability in the VCM engine of FortiClient for Linux versions 6.2.7 and…
CVE-2017-14184 — High (CVSS 8.8): An Information Disclosure vulnerability in Fortinet FortiClient for Windows 5.6.0 and below versions, FortiClient for…
CVE-2016-8493 — High (CVSS 8.8): In FortiClientWindows 5.4.1 and 5.4.2, an attacker may escalate privilege via a FortiClientNamedPipe vulnerability.
CVE-2021-43066 — High (CVSS 8.4): A external control of file name or path in Fortinet FortiClientWindows version 7.0.2 and below, version 6.4.6 and…

All CVEs affecting Fortinet Forticlient →

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities

CVE-2026-46752 — Critical (CVSS 10.0): Redis Lua HEAP overflow in cjson library vulnerability in Apache Kvrocks. This issue affects Apache Kvrocks: from…
CVE-2026-24822 — Critical (CVSS 10.0): Out-of-bounds Write, Heap-based Buffer Overflow vulnerability in ttttupup wxhelper (src modules). This vulnerability is…
CVE-2025-23123 — Critical (CVSS 10.0): A malicious actor with access to the management network could execute a remote code execution (RCE) by exploiting a…
CVE-2022-34819 — Critical (CVSS 10.0): A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions <…
CVE-2026-44050 — Critical (CVSS 9.9): A heap-based buffer overflow in the CNID daemon comm_rcv() function in Netatalk 2.0.0 through 4.4.2 allows a remote…
CVE-2026-49841 — Critical (CVSS 9.8): FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to…

Browse all CWE-122 (Heap-based Buffer Overflow) vulnerabilities →