EUVD-2026-73652
GHSA-7rwg-4366-4vj8
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Network-reachable Schannel service requires low-privilege auth; high complexity for reliable null dereference trigger; availability-only impact with no C or I effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Null pointer dereference in Windows Schannel allows an authorized attacker to deny service over a network.
AnalysisAI
Null pointer dereference in Windows Schannel - Microsoft's native TLS/SSL security package - allows an authenticated network attacker to crash the affected service on Windows Server 2022, Windows Server 2025, and Windows 11 versions 23H2 through 26H1. The CVSS vector (AV:N/AC:H/PR:L) places this as a moderate-severity denial-of-service requiring valid credentials and non-trivial triggering conditions, with no confidentiality or integrity impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker with at least low-level authenticated access (PR:L per CVSS vector) - anonymous unauthenticated exploitation is not supported by the available data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.3 score with vector AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H accurately reflects a moderate, constrained denial-of-service. … 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's released patches via Windows Update or WSUS targeting the following fixed builds: Windows Server 2025 and Server Core ≥ 10.0.26100.33438, Windows Server 2022 ≥ 10.0.20348.5622, Windows 11 23H2 ≥ 10.0.22631.7582, Windows 11 24H2 ≥ 10.0.26100.9445, Windows 11 25H2 ≥ 10.0.26200.9445, and Windows 11 26H1 ≥ 10.0.28000.2954. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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