FKIE_CVE-2026-20803

Vulnerability from fkie_nvd - Published: 2026-01-13 18:16 - Updated: 2026-01-16 14:35
Severity ?
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
References
secure@microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803Vendor Advisory
Impacted products
Vendor Product Version
microsoft sql_server_2022 *
microsoft sql_server_2022 *
microsoft sql_server_2025 17.0.1000.7
To clipboard 

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    {
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              "criteria": "cpe:2.3:a:microsoft:sql_server_2022:*:*:*:*:*:*:x64:*",
              "matchCriteriaId": "571B6885-6FD3-4E3F-A22A-583A0029F20A",
              "versionEndExcluding": "16.0.1165.1",
              "versionStartIncluding": "16.0.1000.6",
              "vulnerable": true
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              "versionEndExcluding": "16.0.4230.2",
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          "negate": false,
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network."
    }
  ],
  "id": "CVE-2026-20803",
  "lastModified": "2026-01-16T14:35:02.720",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "secure@microsoft.com",
        "type": "Primary"
      }
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  "published": "2026-01-13T18:16:06.630",
  "references": [
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      "source": "secure@microsoft.com",
      "tags": [
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  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "secure@microsoft.com",
      "type": "Primary"
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.