EUVD-2026-44082
GHSA-fp27-2rx6-gvr6
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable DC service, low complexity, no auth or interaction (AV:N/AC:L/PR:N/UI:N); availability-only crash (A:H) with no confidentiality or integrity impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionCVE.org
Untrusted pointer dereference in Windows Domain Controller allows an unauthorized attacker to deny service over a network.
AnalysisAI
Denial of service in the Windows Domain Controller role on Windows Server 2025 (including Server Core) and Windows 11 24H2/25H2/26H1 lets a remote, unauthenticated attacker crash or hang authentication services by triggering an untrusted pointer dereference over the network. Because the CVSS vector is PR:N/UI:N with A:H and no confidentiality or integrity impact, a single crafted network exchange can disrupt directory and logon services domain-wide without credentials. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must be running the Windows Domain Controller role on an affected build (Windows Server 2025, Server Core, or the Windows 11 24H2/25H2/26H1 code line), and the attacker needs network reachability to the DC's authentication service ports. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 7.5 (High) driven entirely by availability: AV:N (network-reachable), AC:L (low complexity), PR:N (no privileges), UI:N (no user interaction), with C:N/I:N/A:H - a clean remote unauthenticated DoS, no code execution or data exposure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network access to a domain controller sends a crafted request to a DC service that carries a malformed pointer-bearing structure; the DC dereferences the untrusted pointer and the authentication service faults, dropping or hanging domain logons for all clients that rely on that DC. No credentials or user interaction are needed (PR:N/UI:N/AC:L), so an unauthenticated actor on a reachable network segment can repeat the trigger to sustain the outage. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50424 (patch available per vendor advisory) via Windows Update / WSUS to all domain controllers and to Windows 11 24H2, 25H2 and 26H1 systems, prioritizing broadly-reachable domain controllers first; exact fixed build numbers are in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50424. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all Windows Server 2025 Domain Controllers and Windows 11 systems (versions 24H2, 25H2, 26H1) in your environment and assess network exposure-determine whether domain controllers are reachable from untrusted networks. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Windows 11 Version 24H2
View allLocal privilege escalation in the Microsoft Windows Kernel allows an unauthorized attacker to gain elevated (SYSTEM-leve
Local privilege escalation in the Windows Win32K kernel subsystem (CWE-122 heap-based buffer overflow) lets an already-a
Local privilege escalation in the Windows Kernel lets an already-authenticated attacker corrupt kernel memory via a use-
Local code execution in the Windows DHCP Client service stems from a use-after-free (CWE-416) memory-corruption flaw aff
Local code execution in the Microsoft Message Queuing (MSMQ) Queue Manager affects a broad range of Windows client and s
Elevation of privilege in the Windows NTFS file-system driver lets an already-authenticated local user escalate to SYSTE
Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 throug
Local privilege escalation in the Microsoft Windows Kernel allows an already-authenticated attacker to elevate to SYSTEM
Elevation of privilege in the Windows Hyper-V virtual network switch (VMSwitch) lets an authenticated attacker operating
Remote code execution in the Windows Server Network driver stems from a race condition (CWE-362) that lets an unauthoriz
Remote code execution in Microsoft Windows Remote Desktop (RDP) allows an unauthorized network attacker to run arbitrary
Remote code execution in Microsoft Windows Message Queuing (MSMQ) allows an unauthenticated attacker to run arbitrary co
Same weakness CWE-822 – Untrusted Pointer Dereference
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today