Exploitation evidence
Known exploited · CISA KEV listed
Added 2022-05-24. Ransomware campaign use: Known.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-06-14. 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. / QTS
Default status: Not specified
- affected: unspecified to < 4.4.2.1270 (custom)
QNAP Systems Inc. / QTS
Default status: Not specified
- affected: unspecified to < 4.4.1.1261 (custom)
- affected: unspecified to < 4.3.6.1263 (custom)
QNAP Systems Inc. / QTS
Default status: Not specified
- affected: unspecified to < 4.3.4.1282 (custom)
QNAP Systems Inc. / QTS
Default status: Not specified
- affected: unspecified to < 4.3.3.1252 (custom)
QNAP Systems Inc. / QTS
Default status: Not specified
- affected: unspecified to < 4.2.6 (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
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": 0.22682,
"percentile": 0.97751
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.22682,
"percentile": 0.97737
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.22682,
"percentile": 0.97734
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.22682,
"percentile": 0.97734
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.22682,
"percentile": 0.97733
}07 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.22682,
"percentile": 0.9773
}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.22682,
"percentile": 0.97733
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.22682,
"percentile": 0.97732
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.22682,
"percentile": 0.97728
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.22682,
"percentile": 0.97724
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2018-19943",
"cwes": [
"CWE-79",
"CWE-80"
],
"dateAdded": "2022-05-24",
"dueDate": "2022-06-14",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-19943",
"product": "Network Attached Storage (NAS)",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code.",
"vendorProject": "QNAP",
"vulnerabilityName": "QNAP NAS File Station Cross-Site Scripting Vulnerability"
}