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No exploitation reportedAwaiting NVD analysis

CVE-2026-62903

Microsoft.Data.SqlClient Information Disclosure Vulnerability

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-294

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Authentication bypass by capture-replay in SQL Server allows an unauthorized attacker to disclose information over a network.

Timeline

dates in UTC
  1. 2026-11-1018:15CVE publishedCNA

Versions per branch

Products declared by the CNA

As microsoft, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Microsoft.Data.SqlClient 6.1

    platforms: x64-based Systems

    Affected
    • ≥ 1.0.0.0, < 6.1.7fixed in 6.1.7custom
  • Microsoft.Data.SqlClient 7.0

    platforms: x64-based Systems

    Affected
    • ≥ 1.0.0.0, < 7.0.3fixed in 7.0.3custom
  • Microsoft.Data.SqlClient 7.1

    platforms: x64-based Systems

    Affected
    • ≥ 1.0.0.0, < 7.1.0-preview3fixed in 7.1.0-preview3custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-62903 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.42026-11-10
  • NVDCVSS 3.17.4read 2026-11-10
  • CNAweakness (CWE)CWE-2942026-11-10
  • NVDweakness (CWE)CWE-294read 2026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2026-11-10
Last Modified
2026-11-10
NVD status
Awaiting Analysis

Frequently asked questions

What is CVE-2026-62903?

Authentication bypass by capture-replay in SQL Server allows an unauthorized attacker to disclose information over a network.

Is CVE-2026-62903 actively exploited?

Active exploitation of CVE-2026-62903 has not been confirmed.

What is the CVSS score for CVE-2026-62903?

CVE-2026-62903 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

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