CVE-2025-53845Network attack vector

Disclosure and service interruption via missing OFTP authentication

Published Oct 14, 2025 · Updated Oct 14, 2025

Affected Fortinet FortiAnalyzer releases allow remote attackers to disclose device status data or interrupt service via crafted OFTP requests. The OFTP service processes crafted health and status requests without the required authentication check. Network access to its listener is sufficient without credentials or user interaction; affected branches are 6.4.0 through 6.4.15, 7.0.0 through 7.0.15, 7.2.0 through 7.2.11, 7.4.0 through 7.4.6, and 7.6.0 through 7.6.3.

CVSS severity6.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Affected Fortinet FortiAnalyzer releases allow remote attackers to disclose device status data or interrupt service via crafted OFTP requests. The OFTP service processes crafted health and status requests without the required authentication check. Network access to its listener is sufficient without credentials or user interaction; affected branches are 6.4.0 through 6.4.15, 7.0.0 through 7.0.15, 7.2.0 through 7.2.11, 7.4.0 through 7.4.6, and 7.6.0 through 7.6.3.

The record

CVE
CVE-2025-53845
Published
Oct 14, 2025
Updated
Oct 14, 2025
Vendor
Fortinet
Product
FortiAnalyzer
Classifications
CWE-287, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.0 <=6.4.15
  2. Affected versionversion=7.0.0 <=7.0.14
  3. Affected versionversion=7.2.0 <=7.2.11
  4. Affected versionversion=7.4.0 <=7.4.6
  5. Affected versionversion=7.6.0 <=7.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiAnalyzerversion=6.4.0 <=6.4.15; version=7.0.0 <=7.0.14; version=7.2.0 <=7.2.11; version=7.4.0 <=7.4.6; version=7.6.0 <=7.6.3

Published CVSS scores

6.5FortinetCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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