CVE-2026-41541

Symlink creation in qsyncsrv.cgi

CVSS score

5.3

EPSS probability

—

Risk score

0.5

Published

9 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

CVE-2026-41541: Symlink Creation Vulnerability in Qsync Central

Sources read

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A Unix symbolic link following vulnerability affects Qsync Central in qsyncsrv.cgi. A remote attacker with a user account can exploit this flaw to compromise system security. Users should follow vendor advisories regarding patch status.

Why does it matter?

This vulnerability allows authorized user accounts to compromise system security. Failure to apply appropriate updates may leave systems exposed to potential security risks.

What should be done?

Update Qsync Central to secured versions
Follow vendor security advisories

Chain of evidence and sources2 verified claims

Qsync Central içinde qsyncsrv.cgi bileşenini etkileyen bir sembolik bağ zafiyeti rapor edilmiştir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Uzaktan bir saldırgan kullanıcı hesabı edinerek zafiyeti istismar edebilir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Show the technical text from the sources

An unix symbolic link (symlink) following vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.7 and later Qsync Central 5.1.0.3 and later Qsync Central 5.2.0.5 and later Qsync Central 5.3.0.2 and later

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CWE: CWE-61

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-41541 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	QNAP Systems Inc.	Qsync Central	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
5.3	CVSS V40	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
5.3	CVSS V4_0	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-41541 is associated with the following CWEs:

CWE-61: Common Weakness Enumeration Entry CWE-61

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-41541 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

https://www.qnap.com/en/app-release-notes?keyword=Qsync%20&app=QsyncServer&product-line=nasvendor-advisory

CVSS Vector Radar Chart

5.3 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

QNAP Systems Inc.

Weakness Type (CWE & CAPEC)

CWE-61

Similar Vulnerabilities

9.8

CVE-2018-19949 Actively exploited

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