Medium severity · published Feb 10, 2026
CVE-2025-62439
An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS…
4.2
CVSS
0.2%
EPSS
No
On KEV
Description
An Improper Verification of Source of a Communication Channel vulnerability [CWE-940] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions may allow an authenticated user with knowledge of FSSO policy configurations to gain unauthorized access to protected network resources via crafted requests.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
In the news
VulnerabilityCritical
Siemens RUGGEDCOM APE1808 Devices
View CSAF
Summary
Fortinet has published information on vulnerabilities in FORTIOS. This advisory lists the related Siemens Industrial products. Siemens has released a new version for RUGGEDCOM APE1808 and recommends to update to the latest version.
The following versions of Siemens RUGGEDCOM APE1808 Devices are affected:
RUGGEDCOM APE1808 vers:all/*, vers:all/* (CVE-2026-24858, CVE-2025-55018, CVE-2025-62439, CVE-2025-64157)
CVSS
Vendor
Equipment
Vulnerabilities
v3 9.8
Siemens
Siemens RUGGEDCOM APE1808 Devices
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling'), Improper Verification of Source of a Communication Channel, Use of Externally-Controlled Format String, Authentication Bypass Using an Alternate Path or Channel
Background
Critical Infrastructure Sectors: Critical Manufacturing, Energy, Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
Vulnerabilities
Expand All +
CVE-2025-55018
An inconsistent interpretation of http requests ('http request smuggling') vulnerability in Fortinet FortiOS 7.6.0, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4.3 through 6.4.16 may allow an unauthenticated attacker to smuggle an unlogged http request through the firewall policies via a specially crafted header
View CVE Details
Affected Products
Siemens RUGGEDCOM APE1...
Mar 12, 2026·CISA Advisories