Exploitation evidence
Known exploited · CISA KEV listed
Added 2023-12-21. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date: 2024-01-11. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
QNAP Systems Inc. / VioStor NVR
Default status: unaffected
- affected: 4.x to < 5.0.0 (custom)
Fixes and workarounds
We have already fixed the vulnerability in the following versions: QVR Firmware 5.0.0 and later
Sources and related reporting
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.73277,
"percentile": 0.99467
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.73277,
"percentile": 0.99464
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.73277,
"percentile": 0.99463
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.73277,
"percentile": 0.99463
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.73277,
"percentile": 0.99463
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.73277,
"percentile": 0.99463
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.73277,
"percentile": 0.99462
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.73277,
"percentile": 0.99461
}04 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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"timestamp": "2023-12-20T05:00:54.187898Z",
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}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.73277,
"percentile": 0.9946
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.73277,
"percentile": 0.99459
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-47565",
"cwes": [
"CWE-78"
],
"dateAdded": "2023-12-21",
"dueDate": "2024-01-11",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://www.qnap.com/en/security-advisory/qsa-23-48 ; https://nvd.nist.gov/vuln/detail/CVE-2023-47565",
"product": "VioStor NVR",
"requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "QNAP VioStar NVR contains an OS command injection vulnerability that allows authenticated users to execute commands via a network.",
"vendorProject": "QNAP",
"vulnerabilityName": "QNAP VioStor NVR OS Command Injection Vulnerability"
}