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CVE-2026-105016CriticalFix has a known issueRCENetwork

Microsoft QUIC Remote Code Execution Vulnerability

MSRC advisory NVD CVE.org

Assessment

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

Severity
Critical
CVSS base score
9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
EPSS · 30-day forecast
1.7%FIRST forecast dated 7 Nov 2026, for the following 30 days · FIRST percentile 76.8% · about EPSS
Public detection template
No Nuclei template is listed in the current collected catalog
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Less Likely
Publicly disclosed
No (MSRC assessment)
Customer action
Required: follow the MSRC remediation guidance
Component
Microsoft QUIC
Weakness
CWE-122: Heap-based Buffer Overflow
Issued by
Microsoft
Published
13 Oct 2026 · October 2026
Last revised
13 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
NetworkAV:N
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

7 KBs
KBTypeRestartApplies toKnown issuesOther CVEs
KB5126646 Security UpdateRequiredWindows Server 2025, Windows Server 2025 (Server Core installation)MitigatedUsers might be unable to sign in to OWA or send emails on Exchange ServerAll CVEs in KB5126646
KB5126653 Security UpdateRequiredWindows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based SystemsNone listedAll CVEs in KB5126653
KB5126655 Security UpdateRequiredWindows Server 2022, Windows Server 2022 (Server Core installation)MitigatedUsers might be unable to sign in to OWA or send emails on Exchange ServerAll CVEs in KB5126655
KB5127646 Security UpdateRequiredWindows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based SystemsNone listedAll CVEs in KB5127646
KB5127648 Security UpdateRequiredWindows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 3 moreNone listedAll CVEs in KB5127648
KB5130034 Security UpdateRequired.NET 8.0 runtime installed on WindowsNone listedAll CVEs in KB5130034
KB5130035 Security UpdateRequired.NET 9.0 runtime installed on WindowsNone listedAll CVEs in KB5130035

Affected products

Developer Tools, Windows
20 affected products

Independent patch analysis

Cisco Talos Intelligence

Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities · 13 Oct 2026

Talos supplies analysis and cycle-level Snort rule references. Its article does not map each rule to a CVE or establish protection for your deployment. MSRC remains the source for vulnerability and fixing-update facts.

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  5. Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
  6. Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  7. Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  8. Fixes: KB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required); KB5130034: .NET 8.0 installed on Windows (restart required); KB5130035: .NET 9.0 installed on Windows (restart required) → KB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required); KB5130034: .NET 8.0 runtime installed on Windows (restart required); KB5130035: .NET 9.0 runtime installed on Windows (restart required) · Affected products: .NET 10.0 installed on Windows, .NET 11.0 installed on Windows, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation) → .NET 10.0 runtime installed on Windows, .NET 11.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (60)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 7 Nov 2026 · 16:12:44 UTC EPSS1.7%; scored 6 Nov 2026 → 1.7%; scored 7 Nov 2026
  2. 6 Nov 2026 · 19:15:37 UTC EPSS1.7%; scored 5 Nov 2026 → 1.7%; scored 6 Nov 2026
  3. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  5. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  6. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  7. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  8. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  9. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  10. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  11. 5 Nov 2026 · 23:42:03 UTC EPSS1.7%; scored 4 Nov 2026 → 1.7%; scored 5 Nov 2026
  12. 5 Nov 2026 · 02:36:20 UTC EPSS1.7%; scored 3 Nov 2026 → 1.7%; scored 4 Nov 2026
  13. 4 Nov 2026 · 03:04:37 UTC EPSS1.7%; scored 2 Nov 2026 → 1.7%; scored 3 Nov 2026
  14. 3 Nov 2026 · 01:53:36 UTC EPSS1.7%; scored 1 Nov 2026 → 1.7%; scored 2 Nov 2026
  15. 2 Nov 2026 · 17:30:39 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  16. 2 Nov 2026 · 17:30:39 UTC Source coverage: public-exploit-codeIncomplete → Current
  17. 2 Nov 2026 · 17:30:39 UTC Source coverage: first-epssIncomplete → Current
  18. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  19. 2 Nov 2026 · 16:27:39 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  20. 2 Nov 2026 · 16:27:39 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  21. 2 Nov 2026 · 16:27:39 UTC Source coverage: first-epssCurrent → Incomplete
  22. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  23. 2 Nov 2026 · 00:36:51 UTC EPSS1.7%; scored 31 Oct 2026 → 1.7%; scored 1 Nov 2026
  24. 31 Oct 2026 · 18:22:15 UTC EPSS1.7%; scored 30 Oct 2026 → 1.7%; scored 31 Oct 2026
  25. 30 Oct 2026 · 18:02:45 UTC EPSS1.7%; scored 29 Oct 2026 → 1.7%; scored 30 Oct 2026
  26. 29 Oct 2026 · 20:19:26 UTC Public detection templateNo Nuclei template listed
  27. 29 Oct 2026 · 20:19:26 UTC Customer actionRequired: apply the update → Required: follow the MSRC remediation guidance
  28. 29 Oct 2026 · 20:19:26 UTC Publicly disclosedNo → No (MSRC assessment)
  29. 29 Oct 2026 · 20:19:26 UTC Exploitation detectedNot reported by MSRC → No known exploitation (MSRC assessment)
  30. 29 Oct 2026 · 18:33:30 UTC EPSS1.7%; scored 28 Oct 2026 → 1.7%; scored 29 Oct 2026
  31. 28 Oct 2026 · 20:00:33 UTC EPSS1.7%; scored 27 Oct 2026 → 1.7%; scored 28 Oct 2026
  32. 27 Oct 2026 · 15:48:13 UTC EPSS1.7%; scored 26 Oct 2026 → 1.7%; scored 27 Oct 2026
  33. 26 Oct 2026 · 23:57:09 UTC EPSS1.7%; scored 25 Oct 2026 → 1.7%; scored 26 Oct 2026
  34. 25 Oct 2026 · 17:12:51 UTC EPSS1.0%; scored 24 Oct 2026 → 1.7%; scored 25 Oct 2026
  35. 25 Oct 2026 · 01:34:18 UTC EPSS1.0%; scored 23 Oct 2026 → 1.0%; scored 24 Oct 2026
  36. 23 Oct 2026 · 15:51:28 UTC EPSS1.0%; scored 22 Oct 2026 → 1.0%; scored 23 Oct 2026
  37. 23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
  38. 23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
  39. 23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
  40. 23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
  41. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  42. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  43. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  44. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  45. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  46. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  47. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  48. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  49. 22 Oct 2026 · 22:02:57 UTC Updates that fix itKB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required); KB5130034: .NET 8.0 installed on Windows (restart required); KB5130035: .NET 9.0 installed on Windows (restart required) → KB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required); KB5130034: .NET 8.0 runtime installed on Windows (restart required); KB5130035: .NET 9.0 runtime installed on Windows (restart required)
  50. 22 Oct 2026 · 22:02:57 UTC Affected products.NET 10.0 installed on Windows, .NET 11.0 installed on Windows, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation) → .NET 10.0 runtime installed on Windows, .NET 11.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
  51. 22 Oct 2026 · 17:33:15 UTC EPSS1.0%; scored 21 Oct 2026 → 1.0%; scored 22 Oct 2026
  52. 21 Oct 2026 · 21:47:24 UTC EPSS1.0%; scored 20 Oct 2026 → 1.0%; scored 21 Oct 2026
  53. 20 Oct 2026 · 20:53:31 UTC EPSS1.0%; scored 19 Oct 2026 → 1.0%; scored 20 Oct 2026
  54. 19 Oct 2026 · 15:12:40 UTC EPSS1.0%; scored 18 Oct 2026 → 1.0%; scored 19 Oct 2026
  55. 19 Oct 2026 · 15:12:40 UTC Link: Cisco Talos analysishttps://blog.talosintelligence.com/microsoft-patch-tuesday-for-october-2026
  56. 18 Oct 2026 · 14:54:30 UTC EPSS1.0%; scored 16 Oct 2026 → 1.0%; scored 18 Oct 2026
  57. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
  58. 16 Oct 2026 · 16:13:25 UTC EPSS1.0%; scored 15 Oct 2026 → 1.0%; scored 16 Oct 2026
  59. 15 Oct 2026 · 21:30:54 UTC EPSS1.0%; scored 14 Oct 2026 → 1.0%; scored 15 Oct 2026
  60. 15 Oct 2026 · 01:07:54 UTC EPSSNot scored → 1.0%; scored 14 Oct 2026

Explore global source statements, affected packages and advisory history for CVE-2026-105016. The catalog has a separate collection scope from Microsoft release records.

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

CVE-2026-105016

No KEV entry is attached to this observation; this is not evidence that exploitation is absent.

FIRST EPSS: 1.66 % · percentile 76.77 % · scored 7 Nov 2026.

Observed 07 Nov 2026 16:07:52 UTC · Complete immutable risk JSON

Dated risk observations

Risk history is separate from CNA/OSV content history. Daily score drift is retained but only an upward crossing of 10% triggers the prediction change event.

CVE-2026-105016 · 07 Nov 2026 16:07:52 UTC

CVE-2026-105016 · 06 Nov 2026 19:10:17 UTC

CVE-2026-105016 · 05 Nov 2026 22:49:22 UTC

CVE-2026-105016 · 05 Nov 2026 02:54:06 UTC

CVE-2026-105016 · 03 Nov 2026 16:59:18 UTC

CVE-2026-105016 · 02 Nov 2026 23:59:04 UTC

CVE-2026-105016 · 01 Nov 2026 23:58:58 UTC

CVE-2026-105016 · 01 Nov 2026 03:04:52 UTC

CVE-2026-105016 · 31 Oct 2026 01:52:30 UTC

CVE-2026-105016 · 29 Oct 2026 18:29:26 UTC

CVE-2026-105016 · 28 Oct 2026 19:55:37 UTC

CVE-2026-105016 · 27 Oct 2026 15:46:19 UTC

CVE-2026-105016 · 27 Oct 2026 00:23:05 UTC

CVE-2026-105016 · 25 Oct 2026 15:18:41 UTC

CVE-2026-105016 · 25 Oct 2026 02:24:38 UTC

CVE-2026-105016 · 23 Oct 2026 16:01:26 UTC

Immutable source observations

22 recorded revisions

Each citation identifies one complete source statement. Source modification dates and the time this installation observed them are distinct. Latest history includes records historically associated by source identifiers; a removed alias is not a current equivalence claim. Exact citations show that source record's own earlier observations. Failed reads and unchanged polls do not rewrite history.

7 Nov 2026 04:28:33 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

euvd · EUVD-2026-100459 · Published

5 Nov 2026 03:55:45 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

euvd · EUVD-2026-100459 · Published

3 Nov 2026 02:58:58 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

euvd · EUVD-2026-100459 · Published

1 Nov 2026 02:06:32 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

euvd · EUVD-2026-100459 · Published

30 Oct 2026 01:50:35 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

euvd · EUVD-2026-100459 · Published

28 Oct 2026 00:47:43 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

euvd · EUVD-2026-100459 · Published

25 Oct 2026 04:17:29 UTC

Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.

nvd · CVE-2026-105016 · Published

23 Oct 2026 16:01:25 UTC

Microsoft Security Advisory CVE-2026-105016 - Microsoft QUIC Remote Code Execution Vulnerability

osv · GHSA-5gjq-3f94-rcf7 · Published

ChangeIntel

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