CVE-2025-47294Network attack vector

Unauthenticated csfd crash via integer overflow

Published May 28, 2025 · Updated May 28, 2025

Integer overflow in Fortinet FortiOS Security Fabric allows remote attackers to crash the csfd daemon with a crafted request. The csfd daemon's Security Fabric request processing performs an integer calculation that overflows or wraps on attacker-controlled request data. No authentication or user interaction is required; the documented consequence is interruption of csfd rather than compromise of data or system control.

CVSS severity5.3
Medium
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Fortinet FortiOS Security Fabric allows remote attackers to crash the csfd daemon with a crafted request. The csfd daemon's Security Fabric request processing performs an integer calculation that overflows or wraps on attacker-controlled request data. No authentication or user interaction is required; the documented consequence is interruption of csfd rather than compromise of data or system control.

The record

CVE
CVE-2025-47294
Published
May 28, 2025
Updated
May 28, 2025
Vendor
Fortinet
Product
FortiOS
Classifications
CWE-190, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2025CVE publishedPublication date reported by the CVE source.
  2. May 28, 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 <=6.4.16
  2. Affected versionversion=7.0.0 <=7.0.14
  3. Affected versionversion=7.2.0 <=7.2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiOSversion=6.4.0 <=6.4.16; version=7.0.0 <=7.0.14; version=7.2.0 <=7.2.7

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.8FortinetCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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