Skip to main content

Windows Server CVE-2026-50424

| EUVDEUVD-2026-44082 HIGH
Untrusted Pointer Dereference (CWE-822)
2026-07-14 microsoft GHSA-fp27-2rx6-gvr6
7.5
CVSS 3.1 · Vendor: microsoft
Share

Severity by source

Vendor (microsoft) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

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.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 20:30 vuln.today
CVE Published
Jul 14, 2026 - 17:07 nvd
HIGH 7.5

DescriptionCVE.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. No public exploit identified at time of analysis, and it is not on CISA KEV; Microsoft has released a patch.

Technical ContextAI

The flaw is classified as CWE-822 (Untrusted Pointer Dereference): code takes a pointer value that is influenced by attacker-controlled input and dereferences it without validating that it points to a legitimate, allocated object, causing an invalid memory access and process fault. It resides in the Windows Domain Controller role - the Active Directory / authentication service that Windows Server domain controllers expose over the network (Kerberos, LDAP, Netlogon and RPC-family protocols). Per the CPE data the affected code ships in Windows Server 2025 and Windows Server 2025 Server Core, and Microsoft also lists the Windows 11 client builds 24H2, 25H2 and 26H1 as carrying the vulnerable component. When the untrusted pointer is dereferenced the service faults, which for a DC translates directly into loss of availability for domain logons.

RemediationAI

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. Because domain controllers cannot practically disable the authentication protocols the flaw lives in, patching is the only reliable fix; as an interim compensating control, restrict network reachability of DC service ports (Kerberos 88, LDAP 389/636, RPC/Netlogon endpoint mapper 135 and the dynamic RPC range, SMB 445) to trusted internal management and member-host subnets via host or perimeter firewalls so untrusted networks cannot reach the DC, accepting the trade-off that overly tight filtering can break legitimate client logons, replication or trusts and must be validated before enforcement. Maintain redundant domain controllers so a single crashed DC does not halt domain authentication.

CVE-2026-33824 CRITICAL POC
9.8 Apr 14

Remote code execution in Windows IKE Extension (Internet Key Exchange) via double free memory corruption allows unauthen

CVE-2026-32202 MEDIUM POC
4.3 Apr 14

Windows Shell protection mechanism failure (CVE-2026-32202) allows remote attackers to perform spoofing attacks over a n

CVE-2026-49798 CRITICAL POC
9.3 Jul 14

Local privilege escalation in the Microsoft Windows Kernel allows an unauthorized attacker to gain elevated (SYSTEM-leve

CVE-2026-49795 HIGH POC
8.8 Jul 14

Local privilege escalation in the Windows Kernel lets an already-authenticated attacker corrupt kernel memory via a use-

CVE-2026-54128 HIGH POC
8.4 Jul 14

Local code execution in the Windows DHCP Client service stems from a use-after-free (CWE-416) memory-corruption flaw aff

CVE-2026-50423 HIGH POC
7.8 Jul 14

Local privilege escalation in the Microsoft Windows Kernel allows an already-authenticated attacker to elevate to SYSTEM

CVE-2026-50655 HIGH POC
7.8 Jul 14

Local code execution in the Windows Media component of supported Windows 10, Windows 11, and Windows Server (2016 throug

CVE-2026-54992 HIGH POC
7.8 Jul 14

Local privilege escalation via heap-based buffer overflow in the Windows Message Queuing (MSMQ) Queue Manager component

CVE-2026-50489 HIGH POC
7.8 Jul 14

Local privilege escalation in Microsoft Windows Win32K lets an authenticated low-privileged user corrupt kernel heap mem

CVE-2026-50667 HIGH POC
7.0 Jul 14

Local privilege escalation in the Windows NTFS file system driver lets an authenticated low-privileged user win a race c

CVE-2026-57092 CRITICAL
9.9 Jul 14

Elevation of privilege in the Windows Hyper-V virtual network switch (VMSwitch) lets an authenticated attacker operating

CVE-2026-56190 CRITICAL
9.8 Jul 14

Remote code execution in Microsoft Windows Remote Desktop (RDP) allows an unauthorized network attacker to run arbitrary

Share

CVE-2026-50424 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy