CVE-2026-122166: Windows Remote Desktop Services Elevation of Privilege Vulnerability

Published Nov 10, 2026
·
Updated

Stack-based buffer overflow in Windows Remote Desktop Services allows an authorized attacker to elevate privileges locally.

Other sources

Windows Remote Desktop Services Elevation of Privilege Vulnerability

— Microsoft

Affected Software

28 affected componentsFixes available
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3501
10.0.28000.3501
Microsoft Windows Server 2025<10.0.26100.33822, <10.0.26100.33730
10.0.26100.3382210.0.26100.33730
Microsoft Windows 11=26H1, >=10.0.28000<10.0.28000.3501
10.0.28000.3501
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9974, >=10.0.26300<10.0.26300.9911
10.0.26300.997410.0.26300.9911
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9974, >=10.0.26200<10.0.26200.9911
10.0.26200.997410.0.26200.9911
Microsoft Windows 11=26H2, >=10.0.26300<10.0.26300.9974, >=10.0.26300<10.0.26300.9911
10.0.26300.997410.0.26300.9911
Microsoft Windows 11=25H2, >=10.0.26200<10.0.26200.9974, >=10.0.26200<10.0.26200.9911
10.0.26200.997410.0.26200.9911
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9974, >=10.0.26100<10.0.26100.9911
10.0.26100.997410.0.26100.9911
Microsoft Windows Server 2025<10.0.26100.33822, <10.0.26100.33730
10.0.26100.3382210.0.26100.33730
Microsoft Windows 11=24H2, >=10.0.26100<10.0.26100.9974, >=10.0.26100<10.0.26100.9911
10.0.26100.997410.0.26100.9911
Microsoft Windows Server 2022<10.0.20348.5870
10.0.20348.5870
Microsoft Windows 11=23H2, >=10.0.22631<10.0.22631.7711
10.0.22631.7711
Microsoft Windows Server 2022<10.0.20348.5870
10.0.20348.5870
Microsoft Windows 11=23H2, >=10.0.22631<10.0.22631.7711
10.0.22631.7711
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7846
10.0.19045.7846
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7846
10.0.19045.7846
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7846
10.0.19044.7846
Microsoft Windows 10=22H2, >=10.0.19045<10.0.19045.7846
10.0.19045.7846
Microsoft Windows Server 2019<10.0.17763.9487
10.0.17763.9487
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7846
10.0.19044.7846
Microsoft Windows 10=21H2, >=10.0.19044<10.0.19044.7846
10.0.19044.7846
Microsoft Windows Server 2016<10.0.14393.9688
10.0.14393.9688
Microsoft Windows Server 2019<10.0.17763.9487
10.0.17763.9487
Microsoft Windows 10=1809, >=10.0.17763<10.0.17763.9487
10.0.17763.9487
Microsoft Windows 10=1809, >=10.0.17763<10.0.17763.9487
10.0.17763.9487
Microsoft Windows 10=1607, >=10.0.14393<10.0.14393.9688
10.0.14393.9688
Microsoft Windows 10=1607, >=10.0.14393<10.0.14393.9688
10.0.14393.9688
Microsoft Windows Server 2016<10.0.14393.9688
10.0.14393.9688

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.28000.3501Patch KB5132059
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.33822Fixed in 10.0.26100.33730Patch KB5131077
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26300.9974Fixed in 10.0.26300.9911Patch KB5132043
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26200.9974Fixed in 10.0.26200.9911Patch KB5132043
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.9974Fixed in 10.0.26100.9911Patch KB5132043
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.20348.5870Patch KB5131090
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22631.7711Patch KB5131087
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19044.7846Patch KB5131096
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19045.7846Patch KB5131096
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.17763.9487Patch KB5131085
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.14393.9688Patch KB5131291

Event History

Nov 10, 2026
CVE Published
via Microsoft·04:00 PM
Data Sourced
via Microsoft·04:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·04:00 PM
Affected Software
CVE Published
via MITRE·06:24 PM
Data Sourced
via MITRE·06:24 PM
DescriptionSeverity
Data Sourced
via NVD·07:20 PM
DescriptionSeverityWeakness

Frequently Asked Questions

1

What level of access does an attacker need to exploit this issue?

An attacker must already be authorized on the affected system and able to execute code locally. The vulnerability does not indicate remote exploitation without prior access or user interaction.

2

What is the potential impact of successful exploitation?

Successful exploitation can allow the authorized local attacker to elevate privileges. The supplied severity vector indicates high impact to confidentiality, integrity, and availability.

3

Which systems are identified as affected?

The listed affected software includes Microsoft Windows 10, Windows 11, and Windows Server 2016, 2019, 2022, and 2025.

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