CVE-2024-27130Public exploitNetwork attack vector

Remote code execution via unbounded shared-file copy

Published May 21, 2024 · Updated Aug 2, 2024

Stack-based buffer overflow in QNAP QTS 5.1.x and QuTS hero h5.1.x allows remote attackers to execute code through a shared-file request. The share.cgi get_file_size path passes an attacker-controlled name to No_Support_ACL, where strcpy copies it into a fixed-size stack buffer without checking its length. Exploitation requires a valid ssid from a file shared by a NAS user; successful control of the overflow permits arbitrary code execution.

CVSS severity7.2
High
EPSS probability37.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in QNAP QTS 5.1.x and QuTS hero h5.1.x allows remote attackers to execute code through a shared-file request. The share.cgi get_file_size path passes an attacker-controlled name to No_Support_ACL, where strcpy copies it into a fixed-size stack buffer without checking its length. Exploitation requires a valid ssid from a file shared by a NAS user; successful control of the overflow permits arbitrary code execution.

The record

CVE
CVE-2024-27130
Published
May 21, 2024
Updated
Aug 2, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-120, CWE-121, CAPEC-100, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

7.2QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-121Stack-based Buffer Overflow
CAPEC-100Overflow Buffers
T1190Exploit Public-Facing Application

Public exploit references

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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