November 13, 2026 Follow Egret
CVE-2019-0703 · CVE record: PUBLISHED

Microsoft Windows SMB Information Disclosure Vulnerability

Microsoft Windows, Microsoft Windows Server

An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0704, CVE-2019-0821.

Exploitation evidence

Known exploited · CISA KEV listed

Added 2022-05-23. Ransomware campaign use: Unknown.

CISA required action: Apply updates per vendor instructions.

CISA due date: 2022-06-13. 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

Microsoft / Windows

Default status: Not specified

  • affected: 7 for 32-bit Systems Service Pack 1
  • affected: 7 for x64-based Systems Service Pack 1
  • affected: 8.1 for 32-bit systems
  • affected: 8.1 for x64-based systems
  • affected: RT 8.1
  • affected: 10 for 32-bit Systems
  • affected: 10 for x64-based Systems
  • affected: 10 Version 1607 for 32-bit Systems
  • affected: 10 Version 1607 for x64-based Systems
  • affected: 10 Version 1703 for 32-bit Systems
  • affected: 10 Version 1703 for x64-based Systems
  • affected: 10 Version 1709 for 32-bit Systems
  • affected: 10 Version 1709 for x64-based Systems
  • affected: 10 Version 1803 for 32-bit Systems
  • affected: 10 Version 1803 for x64-based Systems
  • affected: 10 Version 1803 for ARM64-based Systems
  • affected: 10 Version 1809 for 32-bit Systems
  • affected: 10 Version 1709 for ARM64-based Systems

Microsoft / Windows Server

Default status: Not specified

  • affected: 2008 R2 for x64-based Systems Service Pack 1 (Core installation)
  • affected: n/a

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

CVE Program record ↗ · Download tracked evidence as JSON

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": 0.09385,
  "percentile": 0.95473
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.09385,
  "percentile": 0.95443
}
09 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.09385,
  "percentile": 0.95437
}
08 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.09385,
  "percentile": 0.95435
}
07 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.09385,
  "percentile": 0.95433
}
06 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.09385,
  "percentile": 0.95426
}
06 Nov 2026, 12:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

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        "metrics": [
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              "baseScore": 6.5,
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              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
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          },
          {
            "other": {
              "content": {
                "id": "CVE-2019-0703",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-07T16:19:46.019973Z",
                "version": "2.0.3"
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          },
          {
            "other": {
              "content": {
                "dateAdded": "2022-05-23",
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              "type": "kev"
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        ],
        "problemTypes": [
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              {
                "description": "CWE-noinfo Not enough information",
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        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:45:40.413Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "references": [
          {
            "tags": [
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            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0703"
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        ],
        "timeline": [
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            "lang": "en",
            "time": "2022-05-23T00:00:00.000Z",
            "value": "CVE-2019-0703 added to CISA KEV"
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        "title": "CISA ADP Vulnrichment"
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            },
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              "status": "affected",
              "version": "10 Version 1803 for x64-based Systems"
            },
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              "status": "affected",
              "version": "10 Version 1803 for ARM64-based Systems"
            },
            {
              "status": "affected",
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              "status": "affected",
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      ],
      "datePublic": "2019-03-12T00:00:00.000Z",
      "descriptions": [
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      "problemTypes": [
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        "affects": {
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                          {
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05 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.09385,
  "percentile": 0.95422
}
04 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.09385,
  "percentile": 0.95418
}
03 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-03",
  "epss": 0.09385,
  "percentile": 0.95409
}
03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-02",
  "epss": 0.09385,
  "percentile": 0.95403
}
03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2019-0703",
  "cwes": [],
  "dateAdded": "2022-05-23",
  "dueDate": "2022-06-13",
  "forensicTriage": "No",
  "knownRansomwareCampaignUse": "Unknown",
  "notes": "https://nvd.nist.gov/vuln/detail/CVE-2019-0703",
  "product": "Windows",
  "requiredAction": "Apply updates per vendor instructions.",
  "shortDescription": "An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, which could lead to information disclosure from the server.",
  "vendorProject": "Microsoft",
  "vulnerabilityName": "Microsoft Windows SMB Information Disclosure Vulnerability"
}
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