Vulnerability report

Exploited in the wild High confidence Not in CISA KEV

CVE-2023-50358

QTS, QuTS hero, QuTScloud

QNAP / QTS · affected before 5.1.5.2645 build 20240116

Watch CVE-2023-50358 Browse KEV feed
Severity
CVSS 5.8 · Medium
Confidence
High
Exploit status
Exploited in the wild
EPSS
13.5%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2023-50358 is an unauthenticated QTS, QuTS hero, QuTScloud. An OS command injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is high. Also confirmed by third-party sources.

Who is affected?

QNAP / QTS affected before 5.1.5.2645 build 20240116.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

An OS command injection vulnerability has been reported to affect several QNAP operating system versions

An OS command injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to execute commands via a network.

We have already fixed the vulnerability in the following versions: QTS 5.1.5.2645 build 20240116 and later QTS 4.5.4.2627 build 20231225 and later QTS 4.3.6.2665 build 20240131 and later QTS 4.3.4.2675 build 20240131 and later QTS 4.3.3.2644 build 20240131 and later QTS 4.2.6 build 20240131 and later QuTS hero h5.1.5.2647 build 20240118 and later QuTS hero h4.5.4.2626 build 20231225 and later QuTScloud c5.1.5.2651 and later

QNAP Systems Inc. Affected
QTS
Before 5.1.5.2645 build 20240116 Before 4.5.4.2627 build 20231225 Before 4.3.6.2665 build 20240131 Before 4.3.4.2675 build 20240131 Before 4.3.3.2644 build 20240131 Before 4.2.6 build 20240131
QNAP Systems Inc. Affected
QuTS hero
Before h5.1.5.2647 build 20240118 Before h4.5.4.2626 build 20231225
QNAP Systems Inc. Affected
QuTScloud
Before c5.1.5.2651
Published
13 Feb 2024
Exploitation Reported
26 Oct 2025
Attack vector
Adjacent
Complexity
High
Privileges
None
User interaction
None

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

The Shadowserver

Recorded 26 Oct 2025

A trusted third party reported exploitation.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
The Shadowserver First 2025-10-26 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

5.8 Medium

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

EPSS

13.5%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE-78

Timeline

From disclosure to observed exploitation

  1. 00:00 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party attested exploitation

  2. 02:45 UTC

    CVE published

    Vulnerability disclosed publicly

  3. 08:52 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2023-50358

Sample API response 
{
  "cve_id": "CVE-2023-50358",
  "confidence": "High",
  "cvss_score": 5.8,
  "cvss_estimated": false,
  "epss_score": 0.13523,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}