CVE-2024-21902Network attack vector

Authenticated log disclosure and clearing via permission bypass

Published May 21, 2024 · Updated Aug 1, 2024

Authorization bypass in QNAP QTS 5.1.x and QuTS hero h5.1.x allows remote authenticated users to read or modify critical resources. Affected management functions fail to enforce administrator-only permissions, exposing system-log viewing and clearing plus other undisclosed actions. A valid NAS account is required; non-administrator users can access or alter protected management data through the network interface.

CVSS severity8.1
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in QNAP QTS 5.1.x and QuTS hero h5.1.x allows remote authenticated users to read or modify critical resources. Affected management functions fail to enforce administrator-only permissions, exposing system-log viewing and clearing plus other undisclosed actions. A valid NAS account is required; non-administrator users can access or alter protected management data through the network interface.

The record

CVE
CVE-2024-21902
Published
May 21, 2024
Updated
Aug 1, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-732, CWE-200, T1070.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=h5.1.x <h5.1.7.2770 build 20240520

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linn Products Limited · QuTS heroversion=h5.1.x <h5.1.7.2770 build 20240520
Linn Products Limited · QTSversion=5.1.x <5.1.7.2770 build 20240520

Published CVSS scores

6.4QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1070.002Clear Linux or Mac System Logs

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo