Microsoft QUIC
CVE-2023-36435 — Microsoft QUIC Denial of Service Vulnerability
Executive Summary
None
Overview
7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
None
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.5
EPSS Score
0.05473
probability of exploitation in the next 30 days
0.91731 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
8 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| .NET 7.0 | 5031901 (Security Update) |
Important | Denial of Service | Maybe |
| PowerShell 7.3 | Release Notes (Security Update) |
Important | Denial of Service | Maybe |
| Windows 11 version 21H2 for ARM64-based Systems | 5031358 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 version 21H2 for x64-based Systems | 5031358 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 22H2 for ARM64-based Systems | 5031354 (Security Update) |
Important | Denial of Service | Yes |
| Windows 11 Version 22H2 for x64-based Systems | 5031354 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2022 | 5031364 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2022 (Server Core installation) | 5031364 (Security Update) |
Important | Denial of Service | Yes |
Patches
5 patches
| Article | Type | Restart |
|---|---|---|
5031901 |
Security Update | Maybe |
Release Notes |
Security Update | Maybe |
5031358 |
Security Update | Yes |
5031354 |
Security Update | Yes |
5031364 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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