EUVD-2026-73220
GHSA-h3fr-q96q-pff6
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low-privilege account required; high complexity for UAF heap manipulation; full C/I/A impact consistent with SYSTEM-level privilege escalation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Windows DNS allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via use-after-free in the Windows DNS service affects Windows 10, Windows 11, and Windows Server versions from 2012 R2 through 2025, allowing a locally authenticated low-privileged user to gain SYSTEM-level access. The CWE-416 flaw involves improper memory management in DNS handling routines where freed memory can be accessed and manipulated by an attacker with high-complexity exploitation - consistent with heap-grooming or race-condition prerequisites. …
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 attacker must already have local access to the affected system with at minimum a low-privilege (PR:L) account - the Microsoft description explicitly states 'authorized attacker' performing local privilege escalation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score with vector AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H reflects a locally exploitable privilege escalation with full C/I/A impact potential, but the AC:H metric accurately captures the genuine difficulty of reliable UAF exploitation, which typically requires heap grooming, timing-sensitive race conditions, or both. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security updates for your specific Windows version as detailed at the Microsoft Security Response Center advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69310. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Windows 10, 11, and Server 2012 R2-2025 systems and prioritize domain controllers and critical servers for patching. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-416 – Use After Free
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
Leaving vuln.today