Auth bypass in Fortinet Fortianalyzer
CVE-2025-53845
An improper authentication vulnerability [CWE-287] in Fortinet FortiAnalyzer version 7.6.0 through 7.6.3 and before 7.4.6 allows an unauthenticated attacker to obtain information pertaining to the device's health and status, or cause a denial of service via crafted OFTP requests.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (37.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Fortinet Fortianalyzer — versions 7.6.0, 7.4.0, 7.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- fortiguard.fortinet.com/psirt/FG-IR-25-378 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-53845?
- CVE-2025-53845 is a medium-severity vulnerability in Fortinet Fortianalyzer, classified under Improper Authentication. CVSS score: 6.5/10. Published 2025-10-14.
- How severe is CVE-2025-53845?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-53845 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.