CVE-2024-56805Network attack vector

Authenticated memory corruption via undisclosed buffer overflow

Published Jun 6, 2025 · Updated Jun 6, 2025

Buffer overflow in QNAP QTS 5.2.x and QuTS hero h5.2.x allows remote authenticated users to modify memory or crash processes. QNAP has not disclosed the affected component, input vector, or unchecked buffer operation. Exploitation requires a user account and is limited by the published record to memory modification or process crashes.

CVSS severity5.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in QNAP QTS 5.2.x and QuTS hero h5.2.x allows remote authenticated users to modify memory or crash processes. QNAP has not disclosed the affected component, input vector, or unchecked buffer operation. Exploitation requires a user account and is limited by the published record to memory modification or process crashes.

The record

CVE
CVE-2024-56805
Published
Jun 6, 2025
Updated
Jun 6, 2025
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-122, CWE-120, CAPEC-100, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 6, 2025Record 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=h5.2.x <h5.2.4.3079 build 20250321

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linn Products Limited · QuTS heroversion=h5.2.x <h5.2.4.3079 build 20250321
Linn Products Limited · QTSversion=5.2.x <5.2.4.3079 build 20250321

Published CVSS scores

5.3QNAP Systems, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC-100Overflow Buffers
T1499.004Application 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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