IRONSMITHINTEL
HIGHCVSS8.8
|
Actively Exploited
|CISA KEV|CVE-2022-41080|Auth: low — authenticated user|Reboot: required|Manual only

KB5019758: Windows Server Security Update (November 2022)

Microsoft Exchange Server contains an unspecified vulnerability that allows for privilege escalation. This vulnerability is chainable with CVE-2022-41082, which allows for remote code execution.

Published Nov 9, 2022 · 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. CISA has confirmed use of this vulnerability in known ransomware campaigns — treat as high priority for remediation. Federal agencies are required to remediate by 2023-01-31 under CISA BOD 22-01.

How the attack worksNo clicks needed

This vulnerability affects Microsoft Exchange Server. 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:

●Exchange Administrators
●Messaging Team
●IT Security
●Running exchange server: 2013, 2016, 2019
Fixed inKB5019758 (applies to 5 product versions) — build 15.00.1497.044, 15.01.2375.037+
Real-world incidentsWhat we've seen

CISA confirms this CVE has been used in known ransomware campaigns. Added to the KEV catalog on 2023-01-10; federal agencies required to remediate by 2023-01-31.

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 CatalogKB5019758

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Update

    1
    KB5019758 — https://support.microsoft.com/help/5019758

Supersedes: KB5019076, KB5019077

Affected Products

    1
    Microsoft Exchange Server 2013 Cumulative Update 23
    1
    Microsoft Exchange Server 2016 Cumulative Update 22
    1
    Microsoft Exchange Server 2016 Cumulative Update 23
    1
    Microsoft Exchange Server 2019 Cumulative Update 11
    1
    Microsoft Exchange Server 2019 Cumulative Update 12

Fixed Build Numbers

    1
    15.00.1497.044
    1
    15.01.2375.037
    1
    15.01.2507.016
    1
    15.02.0986.036
    1
    15.02.1118.020

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 KB5019758
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 KB5019758 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://www.microsoft.com/download/details.aspx?familyid=09804a62-d5b7-4e38-9902-010326747aef
    1
    https://www.microsoft.com/download/details.aspx?familyid=124eeb2b-4066-459e-9416-ee98683f4997
    1
    https://www.microsoft.com/download/details.aspx?familyid=4342d7ed-0583-4d2c-831c-836ee8f7bf62
    1
    https://www.microsoft.com/download/details.aspx?familyid=bbba5ecc-0ab5-466c-98bb-766c46a78fc2
    1
    https://www.microsoft.com/download/details.aspx?familyid=ddb4f351-5cb6-4ce4-93c1-ec6946f7c26a

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5019758') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-41080
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2022-41080
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41080

Discovery Credit

rskvp93, Q5Ca and nxhoang99 with VcsLab of Viettel Cyber Security, zcgonvh with 360 noah lab

PowerShell automationComing soon

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

References

↗ CVE-2022-41080↗ MSRC Advisory↗ NVD↗ KBKB5019758