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.NET Framework 3.5

.NET Framework 3.5

Every published release for .NET Framework 3.5, newest first: what each update changes, whether to install it and any confirmed known issues.

Latest
KB5127694 Oct 13, 2026
File version
2.0.50727.9188
Released
Nov 19, 2007
All editions
updates until Jan 9, 2029
Known issues
1 open

Update history

  • .NET Framework 3.5 / 4.8 .NET Framework 3.5 / 4.8 for Windows 10 22H2 Optional preview
    Preview

    KB5034582

    Includes 1 improvement

    Includes quality and reliability improvements for .NET Framework 3.5, 4.8, and 4.8.1 on Windows 10, version 22H2. Microsoft reports no known issues.

    Check the newer update, KB5036580

    Key changes 1 change

    • Improved .NET Framework: Includes quality and reliability improvements for .NET Framework 3.5, 4.8, and 4.8.1.

    Read update Source: Microsoft

    Restart
    Required
  • .NET Framework 3.5 / 4.8.1 .NET Framework 3.5 / 4.8.1 for Windows 10 21H2, 22H2 Security update

    KB5033918

    Denial-of-service and privilege vulnerabilities addressed

    The update addresses four vulnerabilities, none rated critical, in .NET Framework. It also addresses a remote code execution vulnerability in an HTTP .NET remoting server channel chain.

    Check the newer update, KB5036618

    Key changes 4 CVEs · 5 changes

    • Fix .NET Framework: A .NET Framework denial-of-service vulnerability is addressed.
    • Fix .NET Framework: A .NET Framework security feature bypass vulnerability is addressed.
    • Fix .NET Framework: A .NET Framework elevation-of-privilege vulnerability is addressed.

    Read update Source: Microsoft

    Builds
    4.8.9214.0 · 2.0.50727.9176
    Security
    4 vulnerabilities fixed
    Restart
    Required
  • .NET Framework 3.5 / 4.8.1 .NET Framework 3.5 / 4.8.1 for Windows Server 2022 Security update

    KB5033922

    Denial-of-service and remote-code-execution flaws addressed

    The update addresses 4 vulnerabilities in .NET Framework 3.5 and 4.8.1, including flaws that could disrupt services or let attackers run code remotely.

    Check the newer update, KB5036621

    Key changes 4 CVEs · 5 changes

    • Fix .NET Framework: The update addresses a flaw that could disrupt a service.
    • Fix .NET Framework: The update blocks a flaw that could let an attacker get around a security feature.
    • Fix .NET Framework: The update addresses a flaw that could let an attacker gain higher access.

    Read update Source: Microsoft

    Builds
    4.8.9214.0 · 2.0.50727.9176
    Security
    4 vulnerabilities fixed
    Restart
    Required
  • .NET Framework 3.5 / 4.8 .NET Framework 3.5 / 4.8 for Windows 10 21H2, 22H2 Security update

    KB5033909

    HTTP remoting code-execution flaw addressed

    The update addresses three listed CVEs, including flaws that could bypass a security check, raise access, or disrupt a service. It also addresses a code-execution flaw in HTTP remoting.

    Check the newer update, KB5036608

    Key changes 3 CVEs · 4 changes

    • Fix .NET Framework: A flaw that could let someone bypass a security check is addressed.
    • Fix .NET Framework: A flaw that could let someone gain higher access is addressed.
    • Fix .NET Framework: A flaw that could stop a service from responding is addressed.

    Read update Source: Microsoft

    Builds
    4.8.4690.0 · 2.0.50727.9176
    Security
    3 vulnerabilities fixed
    Restart
    Required
  • .NET Framework 3.5 / 4.8 .NET Framework 3.5 / 4.8 for Windows Server 2022 Security update

    KB5033914

    HTTP remoting code-execution flaw and three CVEs addressed

    The update addresses three listed vulnerabilities that could bypass a security check, grant excessive access, or disrupt a service, plus a separate code-execution flaw in HTTP .NET remoting.

    Check the newer update, KB5036613

    Key changes 3 CVEs · 4 changes

    • Fix .NET Framework: The update addresses a weakness that could let someone get past a security check.
    • Fix .NET Framework: The update addresses a weakness that could let someone gain more access than intended.
    • Fix .NET Framework: The update addresses a weakness that could make a service stop responding.

    Read update Source: Microsoft

    Builds
    4.8.4690.0 · 2.0.50727.9176
    Security
    3 vulnerabilities fixed
    Restart
    Required
  • .NET Framework 3.5 / 4.8 .NET Framework 3.5 / 4.8 for Windows 10 1809 · Windows Server 2019 Security update

    KB5033911

    Remoting flaw could let attackers run code on servers

    Addresses three .NET Framework vulnerabilities and a flaw that could let attackers run code on a server.

    Check the newer update, KB5036610

    Key changes 3 CVEs · 4 changes

    • Fix .NET Framework: Blocks a way to bypass a security feature.
    • Fix .NET Framework: Closes a flaw that could let someone gain higher access.
    • Fix .NET Framework: Closes a flaw that could stop a service from working.

    Read update Source: Microsoft

    Builds
    4.8.4690.0 · 2.0.50727.9063
    Security
    3 vulnerabilities fixed
    Restart
    Required
  • .NET Framework 3.5 / 4.7.2 .NET Framework 3.5 / 4.7.2 for Windows 10 1809 · Windows Server 2019 Security update

    KB5033904

    Closes .NET flaws, including remote code execution

    The update addresses three listed CVEs and a remote code execution vulnerability involving .NET remoting. It applies to Windows 10, version 1809 and Windows Server 2019.

    Check the newer update, KB5036604

    Key changes 3 CVEs · 4 changes

    • Fix .NET Framework: Addresses a flaw that could let someone get around .NET Framework security protections.
    • Fix .NET Framework: Addresses a flaw that could let someone gain permissions they should not have.
    • Fix .NET Framework: Addresses a flaw that could make a service unavailable.

    Read update Source: Microsoft

    Builds
    4.7.4081.0 · 2.0.50727.9063
    Security
    3 vulnerabilities fixed
    Restart
    Required