EUVD-2026-43985
GHSA-rmfg-jhvq-w5r5
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description states local privilege elevation by an authorized attacker, so AV:L and PR:L; low complexity and full host compromise give AC:L and C/I/A:H with unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Windows DNS lets an already-authenticated, low-privileged attacker corrupt heap memory to gain higher (likely SYSTEM) privileges on affected Windows 10, Windows 11, and Windows Server 2022/2025 systems. The flaw is a heap-based buffer overflow (CWE-122) reported by Microsoft itself, with a vendor patch available via MSRC. …
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 | Exploitation requires local access to an affected Windows system and a valid low-privileged account or existing code execution on the host (CVSS PR:L, AV:L) - it cannot be triggered remotely or by an unauthenticated actor from the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 7.8) describes a local, low-complexity attack requiring low privileges and no user interaction, yielding full confidentiality, integrity, and availability impact on the host - a classic local privilege escalation profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already obtained a low-privileged foothold on a Windows host or DNS server - for example a standard domain user account on an RDP session host, or code execution from a separate low-severity bug - triggers the heap-based buffer overflow in the Windows DNS component to corrupt heap memory and elevate to SYSTEM. With SYSTEM privileges the attacker can install tooling, harvest credentials, and pivot across the domain. … |
| Remediation | Apply the Microsoft security update for CVE-2026-49175 (Patch available per vendor advisory) referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49175; install the corresponding monthly cumulative update for each affected SKU, prioritizing Windows Server 2022/2025 hosts running the DNS Server role and any multi-user or session-host systems where local footholds are likely. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025 systems and identify DNS-critical infrastructure including domain controllers. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Windows 10 Version 21H2
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-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today