CVE-2026-49178: Windows Active Directory Domain Services Remote Code Execution Vulnerability
Published Jul 14, 2026
·Updated
Heap-based buffer overflow in Active Directory Domain Services allows an authorized attacker to execute code over a network.
Other sources
Windows Active Directory Domain Services Remote Code Execution Vulnerability
— Microsoft
Affected Software
50 affected componentsFixes available
Microsoft Windows 10=1607
10.0.14393.9339
Microsoft Windows 10=1607
10.0.14393.9339
Microsoft Windows Server 2016<10.0.14393.9339
10.0.14393.9339
Microsoft Windows Server 2025<10.0.26100.33158
10.0.26100.33158
Microsoft Windows Server 2016<10.0.14393.9339
10.0.14393.9339
Microsoft Windows 11=25H2
10.0.26200.8875
Microsoft Windows 11=26H1
10.0.28000.2525
Microsoft Windows 11=25H2
10.0.26200.8875
Microsoft Windows 11=24H2
10.0.26100.8875
Microsoft Windows 11=24H2
10.0.26100.8875
Microsoft Windows 10=22H2
10.0.19045.7548
Microsoft Windows Server 2025<10.0.26100.33158
10.0.26100.33158
Microsoft Windows 10=21H2
10.0.19044.7548
Microsoft Windows 10=21H2
10.0.19044.7548
Microsoft Windows Server 2022<10.0.20348.5386
10.0.20348.5386
Microsoft Windows 10=1809
10.0.17763.9020
Microsoft Windows 10=1809
10.0.17763.9020
Microsoft Windows 10=21H2
10.0.19044.7548
Microsoft Windows Server 2019<10.0.17763.9020
10.0.17763.9020
Microsoft Windows Server 2019<10.0.17763.9020
10.0.17763.9020
Microsoft Windows Server 2012 R2<6.3.9600.23291
6.3.9600.23291
Microsoft Windows 10=22H2
10.0.19045.7548
Microsoft Windows 10=22H2
10.0.19045.7548
Microsoft Windows Server 2012<6.2.9200.26226
6.2.9200.26226
Microsoft Windows Server 2012 R2<6.3.9600.23291
6.3.9600.23291
Microsoft Windows Server 2012<6.2.9200.26226
6.2.9200.26226
Microsoft Windows 11=26H1
10.0.28000.2269
Microsoft Windows 10 1607<10.0.14393.9339
Microsoft Windows 10 1607<10.0.14393.9339
Microsoft Windows 10 1809<10.0.17763.9020
Microsoft Windows 10 1809<10.0.17763.9020
Microsoft Windows 10 21h2<10.0.19044.7548
Microsoft Windows 10 21h2<10.0.19044.7548
Microsoft Windows 10 21h2<10.0.19044.7548
Microsoft Windows 10 22h2<10.0.19045.7548
Microsoft Windows 10 22h2<10.0.19045.7548
Microsoft Windows 10 22h2<10.0.19045.7548
Microsoft Windows 11 24h2<10.0.26100.8875
Microsoft Windows 11 24h2<10.0.26100.8875
Microsoft Windows 11 25h2<10.0.26200.8875
Microsoft Windows 11 25h2<10.0.26200.8875
Microsoft Windows 11 26h1<10.0.28000.2269
Microsoft Windows 11 26h1<10.0.28000.2525
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016<10.0.14393.9339
Microsoft Windows Server 2019<10.0.17763.9020
Microsoft Windows Server 2022<10.0.20348.5386
Microsoft Windows Server 2025<10.0.26100.33158
Microsoft Windows 11=26H1
10.0.28000.2525
Remediation
Event History
Jul 14, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:05 PM
Data Sourced
via MITRE·05:05 PM
DescriptionSeverity
Data Sourced
via NVD·05:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-49178?
CVE-2026-49178 has a high severity rating of 8.8.
2
What impact does CVE-2026-49178 have on affected systems?
CVE-2026-49178 allows an authorized attacker to execute remote code on systems running affected versions of Windows Active Directory.
3
How can I fix CVE-2026-49178?
To fix CVE-2026-49178, apply the latest security updates from Microsoft for the affected Windows systems.
4
Which software is affected by CVE-2026-49178?
CVE-2026-49178 affects various versions of Microsoft Windows, including Windows 10, Windows 11, and several Windows Server versions.
5
What type of vulnerability is CVE-2026-49178 classified as?
CVE-2026-49178 is classified as a heap-based buffer overflow vulnerability.