EUVD-2026-73626
GHSA-rfcc-gqrr-f6pv
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Adjacent network (DHCP is LAN-only), no auth or interaction needed, availability-only impact via memory exhaustion; C and I are N.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Missing release of memory after effective lifetime in Windows DHCP Client allows an unauthorized attacker to deny service over an adjacent network.
AnalysisAI
Memory exhaustion via crafted DHCP packets in Windows 11 and Windows Server 2025 allows an unauthenticated adjacent-network attacker to crash or degrade the DHCP client service. The root cause is CWE-401 (missing memory release after effective lifetime), meaning the DHCP client allocates memory when processing incoming DHCP messages but fails to free it, making the system vulnerable to progressive memory exhaustion. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be on the same adjacent network (LAN, VLAN, or broadcast domain) as the target host; remote internet-based exploitation is not possible per AV:A. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yields 6.5 (Medium), which is consistent with the attack characteristics: no privileges, no user interaction, low complexity, but constrained to adjacent-network reach (attacker must be on the same LAN or broadcast domain). … 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-released security update for this CVE, which brings affected systems to or above the following build thresholds: Windows 11 24H2/Server 2025 to build 10.0.26100.33438 or later, Windows 11 25H2 to build 10.0.26200.9445 or later, and Windows 11 26H1 to build 10.0.28000.2954 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-401 – Memory Leak
View allSame technique Denial Of Service
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External POC / Exploit Code
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