CVE-2024-38643Network attack vector

Unauthenticated access to critical system functions

Published Nov 22, 2024 · Updated Nov 22, 2024

Missing authentication for critical functions in QNAP Notes Station 3 3.9.0 through 3.9.6 allows remote attackers to access the system. QNAP has not disclosed the affected endpoint, function, or authentication check that accepts unauthorized requests. Network access without credentials or user interaction is sufficient; successful exploitation grants system access and execution of selected functions.

CVSS severity9.3
Critical
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication for critical functions in QNAP Notes Station 3 3.9.0 through 3.9.6 allows remote attackers to access the system. QNAP has not disclosed the affected endpoint, function, or authentication check that accepts unauthorized requests. Network access without credentials or user interaction is sufficient; successful exploitation grants system access and execution of selected functions.

The record

CVE
CVE-2024-38643
Published
Nov 22, 2024
Updated
Nov 22, 2024
Vendor
Linn Products Limited
Product
Notes Station 3
Classifications
CWE-306, CAPEC-115, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 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=3.9.0 <3.9.7
  2. Affected versionversion=3.9.x <3.9.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Linn Products Limited · Notes Station 3version=3.9.0 <3.9.7; version=3.9.x <3.9.7

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3QNAP Systems, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA: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-306Missing Authentication for Critical Function
CAPEC-115Authentication Bypass
T1190Exploit Public-Facing Application

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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