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CVE-2026-62815Suited to automated attack · CISA

Microsoft QUIC Remote Code Execution Vulnerability

CVSS score

9.8

EPSS probability

%1.0

Risk score

0.1

Published

2 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-62815 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-62815 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1microsoftWindows 11 version 23H2 View
2microsoftWindows 11 Version 24H2 View
3microsoftWindows 11 Version 25H2 View
4microsoftWindows 11 version 26H1 View
5microsoftwindows server 2022 View
6microsoftwindows server 2025 View
7microsoftWindows Server 2025 (Server Core installation) View
8microsoftwindows 11 23h2 View
9microsoftwindows 11 24h2 View
10microsoftwindows 11 25h2 View
11microsoftwindows 11 26h1 View
12microsoftwindows server 2022 View
13microsoftwindows server 2025 View
14nugetMicrosoft.Native.Quic.MsQuic.OpenSSL View
15nugetMicrosoft.Native.Quic.MsQuic.Schannel View
16nugetMicrosoft.Native.Quic.MsQuic.OpenSSL View
17nugetMicrosoft.Native.Quic.MsQuic.Schannel View
18nugetMicrosoft.Native.Quic.MsQuic.Schannel View
Total affected vendors: 2|Products: 18

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
10.0CVSS 4.0—Vector not publishedGitHub Advisory
9.8CVSS 3.x—CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CMicrosoft MSRC
9.8CVSS V3_1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CCVE CNA
9.8CVSS V31CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD
9.8CVSS 3.x—Vector not publishedGitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

21 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

Microsoft QUIC Remote Code Execution Vulnerability

Open source
nvd

NVD tarafından Patch olarak etiketlenmiş referans

Open source
gitlabnuget/Microsoft.Native.Quic.MsQuic.Schannel2.4.19

GitLab Advisory düzeltilmiş sürüm: 2.4.19

gitlabnuget/Microsoft.Native.Quic.MsQuic.Schannel2.5.10

GitLab Advisory düzeltilmiş sürüm: 2.5.10

gitlab

Upgrade to versions 2.4.19, 2.5.10 or above.

reference

Microsoft QUIC Remote Code Execution Vulnerability

Open source
reference

5120242

Open source
reference

Yama veya çözüm referansı

Open source
reference

5120229

Open source
reference

Yama veya çözüm referansı

Open source
reference

5120233

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-62815 is associated with the following CWEs:

CWE-416: Use After FreeCWE-937: Common Weakness Enumeration Entry CWE-937CWE-1035: Common Weakness Enumeration Entry CWE-1035

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-62815 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

Microsoft QUIC Remote Code Execution Vulnerabilitypatch5120242patchhttps://support.microsoft.com/help/5120242patch5120229patchhttps://support.microsoft.com/help/5120229patch5120233patchhttps://support.microsoft.com/help/5120233patch5120228patchhttps://support.microsoft.com/help/5120228patch5121003patch

CVSS Vector Radar Chart

9.8 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama doğrulandı

21 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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Weakness Type (CWE & CAPEC)

CWE-416 CWE-937 CWE-1035

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