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Vulnerability in winsqlite3.dll --3.51.1.0 to 3.51.2

Sadha Sivam Manjunath (NCS) 20 Reputation points
2026-04-23T08:37:45.3133333+00:00

We have a potential security vulnerability related to the winsqlite3.dll file located in C:\Windows\System32. The current version of this DLL is an older version of SQLite that is affected by CVE-2025-70873.

It seems like winsqlite3.dll is typically updated via Windows Update, but i can't see a newer version in the April

Do you plan to release an updated version? If not, is there a workaround? Or is it safe to replace winsqlite3.dll with a newer version of SQLite?

CVE-2025-70873

Windows server 2016 and 2019

Path : C:\Windows\System32\winsqlite3.dll

Installed version : 3.51.1.0

Fixed version : 3.51.2

Windows for business | Windows Server | Devices and deployment | Other

Answer accepted by question author

Harry Phan 20,215 Reputation points Independent Advisor
2026-04-23T12:40:37.85+00:00

Hello Sadha,

You should not manually replace winsqlite3.dll in C:\Windows\System32, as this DLL is a system component that is serviced exclusively through Windows Update. Replacing it with a standalone SQLite build will break servicing integrity and may cause system instability or block future cumulative updates. Microsoft typically addresses CVEs like 2025‑70873 through monthly security rollups, but if the April update did not include the patched 3.51.2 build, it means the fix has not yet been released for Windows Server 2016/2019. The correct approach is to monitor the Microsoft Security Response Center (MSRC) advisories and apply the next cumulative update once the patched DLL is included. In the meantime, the only safe workaround is to restrict or monitor applications that directly invoke winsqlite3.dll, since the DLL is not generally exposed to remote exploitation unless an application explicitly uses it. If you need confirmation of release timelines, track the CVE entry on MSRC and the monthly “Windows Server Update” KB articles. Do not attempt manual replacement; wait for the official update.

If the above response helps answer your question, please hit "Accept Answer" so that others in the community facing similar issues can easily find the solution. Your contribution is highly appreciated.

Harry.

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  1. AI answer

    2026-04-23T08:37:58.9433333+00:00

    For Windows Server 2016 and 2019, WinSqlite3.dll is a Windows core component that is serviced only through Windows Update. It must not be manually replaced with a different SQLite build or a third‑party DLL, because that can break Windows components and other applications that depend on the system version.

    Recent security updates for supported Windows versions include an updated WinSqlite3.dll specifically to address prior vulnerability detections by security software:

    • For Windows Server 2019 and Windows 10, version 1809, the January 13, 2026 update KB5073723 updates WinSqlite3.dll so that security software no longer flags it as vulnerable.
    • For Windows Server 2016 and Windows 10, version 1607, the January 13, 2026 update KB5073722 carries the same note and servicing behavior.

    The guidance for vulnerability detections is:

    1. Ensure the latest cumulative update for the OS is installed (for example, KB5073723 on Server 2019 or KB5073722 on Server 2016, or any newer cumulative update that supersedes them). These updates include the current, supported WinSqlite3.dll.
    2. Do not replace WinSqlite3.dll manually. It is a Windows component and is serviced only via Windows Update.
    3. Distinguish WinSqlite3.dll from sqlite3.dll:
      • WinSqlite3.dll is the Windows core component in %SystemRoot% (such as C:\Windows\System32) and is updated by Windows.
      • sqlite3.dll is an application-specific library shipped by individual apps. If a security scanner flags sqlite3.dll as vulnerable, the remediation is to update or patch the application that installed it. If the app is from Microsoft and distributed via Microsoft Store, install the latest version of that app from the Store.

    If a vulnerability scanner still reports WinSqlite3.dll as vulnerable after all current Windows updates are installed, the next step is to:

    • Verify that the system is fully patched with the latest monthly cumulative update for the OS version.
    • Engage the security tool vendor to confirm their detection logic against the current WinSqlite3.dll build from the latest cumulative update.

    There is no supported workaround that involves manually dropping in a newer SQLite build to replace WinSqlite3.dll.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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