CVE-2026-49164
Actively exploited. CVE-2026-49164 is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Microsoft has fixed a very large number of vulnerabilities in Windows. An attacker can exploit the vulnerabilities to carry out attacks that can lead to categories of damage, as mentioned in the table below. The most severe vulnerabilities have been assigned characteristics CVE-2026-49172, CVE-2026-56190, CVE-2026-54990, CVE-2026-49798, CVE-2026-50380, CVE-2026-50447, CVE-2026-50518, CVE-2026-56159, CVE-2026-56188, and CVE-2026-57092 and are located in the FTP service, Remote Desktop (client and server), the Kernel, GDI+, Message Queuing Service, DHCP Server, Server Network Driver, and VMSwitch, respectively. Attackers with access to these services may be able to execute code or gain access to the vulnerable system without prior authentication. In addition to these severe vulnerabilities, more than 400 vulnerabilities have been fixed, all varying in severity from medium to high/critical. Due to the nature and scope of these updates, the NCSC advises to prioritize the deployment of these updates.
CSIRTS triage
- What
- Microsoft has fixed a large number of vulnerabilities in Windows that can be exploited by attackers.
- Who is affected
- Users of Microsoft Windows operating systems.
- Urgency
- Remediation is urgent due to active exploitation of these vulnerabilities.
- Action
- Users should apply the latest patches provided by Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 48% of all EPSS-scored CVEs.
Advisory coverage (3)
- unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl · 2026-07-14
- highCVE-2026-49164: Heap-based buffer overflow in Active Directory Domain Services allows an unauthorized attacker…nvd · 2026-07-14
- highCVE-2026-49164: Windows Active Directory Domain Services Remote Code Execution Vulnerabilitymsrc · 2026-07-14
External references
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