CVE-2024-23662Network attack vector

Unauthenticated version disclosure via web-server ETags

Published Apr 9, 2024 · Updated Aug 22, 2024

Information exposure in affected Fortinet FortiOS releases allows remote attackers to read the installed version via HTTP requests. The web server emits an ETag value that exposes the running FortiOS version instead of withholding build-identifying metadata. No authentication or user interaction is required, and the disclosed version supports fingerprinting for a follow-on attack but does not itself alter data or service availability.

CVSS severity5.3
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in affected Fortinet FortiOS releases allows remote attackers to read the installed version via HTTP requests. The web server emits an ETag value that exposes the running FortiOS version instead of withholding build-identifying metadata. No authentication or user interaction is required, and the disclosed version supports fingerprinting for a follow-on attack but does not itself alter data or service availability.

The record

CVE
CVE-2024-23662
Published
Apr 9, 2024
Updated
Aug 22, 2024
Vendor
Fortinet
Product
FortiOS
Classifications
CWE-200, T1595.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 <=7.0.15
  3. Affected versionversion=7.2.0 <=7.2.5
  4. Affected versionversion=7.4.0 <=7.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fortinet · FortiOSversion=6.4.0 <=6.4.15; version=7.0.0 <=7.0.15; version=7.2.0 <=7.2.5; version=7.4.0 <=7.4.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.3Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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-200Exposure of Sensitive Information to an Unauthorized Actor
T1595.002Vulnerability Scanning

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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