CVE-2025-58472Network attack vector

Administrator-gated denial of service via NULL dereference

Published Feb 11, 2026 · Updated Feb 11, 2026

NULL pointer dereference in QNAP Qsync Central before 5.0.0.4 allows remote authenticated users with administrator access to interrupt the service. QNAP has not disclosed the affected component, triggering input, or operation that dereferences the NULL pointer. Exploitation requires a Qsync Central administrator account and is bounded to denial of service; no code execution or data disclosure is reported.

CVSS severity5.1
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in QNAP Qsync Central before 5.0.0.4 allows remote authenticated users with administrator access to interrupt the service. QNAP has not disclosed the affected component, triggering input, or operation that dereferences the NULL pointer. Exploitation requires a Qsync Central administrator account and is bounded to denial of service; no code execution or data disclosure is reported.

The record

CVE
CVE-2025-58472
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Linn Products Limited
Product
Qsync Central
Classifications
CWE-476, CAPEC-129, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2026Record 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=5.0.x.x <5.0.0.4 ( 2026/01/20 )

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Linn Products Limited · Qsync Centralversion=5.0.x.x <5.0.0.4 ( 2026/01/20 )

Published CVSS scores

4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
5.1QNAP Systems Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
1.2QNAP Systems Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CAPEC-129Pointer Manipulation
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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