EUVD-2026-56370
GHSA-cr3j-p872-8mv4
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Adjacent network access required; no auth or user interaction needed; impact is read-only memory disclosure with no integrity or availability consequence.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
AnalysisAI
Integer underflow (CWE-125) in the Windows DHCP Server service exposes server memory contents to unauthenticated attackers positioned on the same adjacent network segment. Affecting Windows Server versions from 2012 through 2025 (confirmed by ENISA EUVD-2026-56370), the flaw allows crafted DHCP packets to trigger an out-of-bounds read, resulting in high-confidence confidentiality impact with no integrity or availability consequences. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Windows DHCP Server role (not installed by default on Windows Server) must be explicitly enabled and running on the target system - standard Windows Server installations without this role are not affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 Medium score is broadly appropriate. … 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 Microsoft-released updates to reach the following minimum fixed build versions: Windows Server 2012 to 6.2.9200.26279, Windows Server 2012 R2 to 6.3.9600.23337, Windows Server 2016 to 10.0.14393.9418, Windows Server 2019 to 10.0.17763.9115, Windows Server 2022 to 10.0.20348.5499, and Windows Server 2025 to 10.0.26100.33296. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
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External POC / Exploit Code
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