CVE-2023-32971Network attack vector

Authenticated code execution via unchecked buffer copy

Published Oct 6, 2023 · Updated Sep 19, 2024

Buffer overflow in QNAP QTS, QuTS hero, and QuTScloud allows remote authenticated administrators to execute code through network input. QNAP has not disclosed the affected component or copy routine; it states only that the routine copies input without checking its size. Administrator access to the management interface is required, and successful exploitation executes code on the affected storage system.

CVSS severity3.8
Low
EPSS probability0.55%
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, QuTS hero, and QuTScloud allows remote authenticated administrators to execute code through network input. QNAP has not disclosed the affected component or copy routine; it states only that the routine copies input without checking its size. Administrator access to the management interface is required, and successful exploitation executes code on the affected storage system.

The record

CVE
CVE-2023-32971
Published
Oct 6, 2023
Updated
Sep 19, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-121, CWE-120, CWE-787, T1210
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 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=h4.5.x <h4.5.4.2476 build 20230728
  2. Affected versionversion=h5.0.x <h5.0.1.2515 build 20230907
  3. Affected versionversion=h5.1.x <h5.1.0.2424 build 20230609

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Linn Products Limited · QuTS heroversion=h4.5.x <h4.5.4.2476 build 20230728; version=h5.0.x <h5.0.1.2515 build 20230907; version=h5.1.x <h5.1.0.2424 build 20230609
Linn Products Limited · QuTScloudversion=c5.0.x <c5.1.0.2498
Linn Products Limited · QTSversion=4.5.x <4.5.4.2467 build 20230718; version=5.0.x <5.0.1.2425 build 20230609; version=5.1.x <5.1.0.2444 build 20230629

Published CVSS scores

7.2NISTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
3.8QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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