IRONSMITHINTEL
HIGHCVSS8.8
|
Actively Exploited
|CISA KEV|CVE-2025-33073|Auth: low — authenticated user|Reboot: required|Manual only

KB5060118: Windows Server Security Update (June 2025)

Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate.

Published Jun 10, 2025 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A remote attacker, with a low-privilege account, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2025-11-10 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Software Vulnerability (CWE-284) (CWE-284) vulnerability in Microsoft Windows. Improper access control in Windows SMB allows an authorized attacker to elevate privileges over a network. Exploitation requires remote network access, low attack complexity, a low-privilege authenticated account, and no user interaction required.

Am I affected?Quick check

Probably yes if any of these apply:

●Windows Administrators
●Systems Engineers
●IT Security
●Running windows 10 1507: v < 10.0.10240.21034; windows 10 1607: v < 10.0.14393.8148; windows 10 1809: v < 10.0.17763.7434; windows 10 21h2: v < 10.0.19044.5965; windows 10 22h2: v < 10.0.19045.5965; windows 11 22h2: v < 10.0.22621.5472; windows 11 23h2: v < 10.0.22631.5472; windows 11 24h2: v < 10.0.26100.4270; windows server 2008: -, r2; windows server 2012: -, r2; windows server 2016: v < 10.0.14393.8148; windows server 2019: v < 10.0.17763.7434; windows server 2022: v < 10.0.20348.3745; windows server 2022 23h2: v < 10.0.25398.1665; windows server 2025: v < 10.0.26100.4270
Fixed inKB5060118, KB5060525, KB5060526, KB5060531, KB5060533, KB5060841, KB5060842, KB5060998, KB5060999, KB5061010, KB5061018, KB5061026, KB5061036, KB5061059, KB5061072, KB5061078 (applies to 37 product versions) — build 10.0.10240.21034, 10.0.14393.8148+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2025-10-20 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2025-11-10.

How to patch

Manual download

For air-gapped servers or out-of-band deployment. Microsoft Update Catalog returns every OS-version variant of this update.

↗ Microsoft Update CatalogKB5060118

Manual remediation steps

Apply the Microsoft Security Update

Microsoft has released an official security update that fixes this vulnerability.

Required KB Updates

    1
    KB5060118 — https://support.microsoft.com/help/5060118
    1
    KB5060525 — https://support.microsoft.com/help/5060525
    1
    KB5060526 — https://support.microsoft.com/help/5060526
    1
    KB5060531 — https://support.microsoft.com/help/5060531
    1
    KB5060533 — https://support.microsoft.com/help/5060533
    1
    KB5060841 — https://support.microsoft.com/help/5060841
    1
    KB5060842 — https://support.microsoft.com/help/5060842
    1
    KB5060998 — https://support.microsoft.com/help/5060998
    1
    KB5060999 — https://support.microsoft.com/help/5060999
    1
    KB5061010 — https://support.microsoft.com/help/5061010
    1
    KB5061018 — https://support.microsoft.com/help/5061018
    1
    KB5061026 — https://support.microsoft.com/help/5061026
    1
    KB5061036 — https://support.microsoft.com/help/5061036
    1
    KB5061059 — https://support.microsoft.com/help/5061059
    1
    KB5061072 — https://support.microsoft.com/help/5061072
    1
    KB5061078 — https://support.microsoft.com/help/5061078

Supersedes: KB5058379, KB5058383, KB5058384, KB5058385, KB5058387, KB5058392, KB5058403, KB5058405, KB5058411, KB5058430, KB5058449, KB5058451, KB5058497, KB5058500

Affected Products

    1
    Windows 10 Version 1607 for 32-bit Systems
    1
    Windows 10 Version 1607 for x64-based Systems
    1
    Windows 10 Version 1809 for 32-bit Systems
    1
    Windows 10 Version 1809 for x64-based Systems
    1
    Windows 10 Version 21H2 for 32-bit Systems
    1
    Windows 10 Version 21H2 for ARM64-based Systems
    1
    Windows 10 Version 21H2 for x64-based Systems
    1
    Windows 10 Version 22H2 for 32-bit Systems
    1
    Windows 10 Version 22H2 for ARM64-based Systems
    1
    Windows 10 Version 22H2 for x64-based Systems
    1
    Windows 10 for 32-bit Systems
    1
    Windows 10 for x64-based Systems
    1
    Windows 11 Version 22H2 for ARM64-based Systems
    1
    Windows 11 Version 22H2 for x64-based Systems
    1
    Windows 11 Version 23H2 for ARM64-based Systems
    1
    Windows 11 Version 23H2 for x64-based Systems
    1
    Windows 11 Version 24H2 for ARM64-based Systems
    1
    Windows 11 Version 24H2 for x64-based Systems
    1
    Windows Server 2008 R2 for x64-based Systems Service Pack 1
    1
    Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
    1
    (…17 more product versions)

Fixed Build Numbers

    1
    10.0.10240.21034
    1
    10.0.14393.8148
    1
    10.0.17763.7434
    1
    10.0.19044.5965
    1
    10.0.19045.5965
    1
    10.0.20348.3745
    1
    10.0.20348.3807
    1
    10.0.22621.5472
    1
    10.0.22631.5472
    1
    10.0.25398.1665
    1
    (…6 more builds)

Installation Methods

Windows Update (recommended)

1
Settings → Windows Update → Check for updates
2
The security update is offered if your system is in scope
3
Restart when prompted — a reboot IS required to complete the install

Microsoft Update Catalog (manual download)

1
Open https://catalog.update.microsoft.com
2
Search for KB5060118
3
Download the package matching your OS architecture and Windows build
4
Run the .msu installer with administrator privileges
5
Restart when prompted

WSUS / SCCM / Intune

Approve KB5060118 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5060118
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5060525
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5060526
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5060531
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5060533
    1
    (…11 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5060118','KB5060525','KB5060526','KB5060531','KB5060533','KB5060841','KB5060842','KB5060998','KB5060999','KB5061010','KB5061018','KB5061026','KB5061036','KB5061059','KB5061072','KB5061078') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-33073
    1
    KB article: https://support.microsoft.com/help/5060118
    1
    KB article: https://support.microsoft.com/help/5060525
    1
    KB article: https://support.microsoft.com/help/5060526
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2025-33073
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-33073

Discovery Credit

James Forshaw of Google Project Zero, RedTeam Pentesting GmbH, Stefan Walter and Daniel Isern with SySS GmbH, Ahamada M'Bamba (h1roki), Cameron Stish with GuidePoint Security, Wilfried Bécard with Synacktiv, Keisuke Hirata with CrowdStrike

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2025-33073↗ MSRC Advisory↗ NVD↗ KBKB5060118