VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 9.8 criticalEPSS 1.7% probability of exploitation in 30 days
Microsoft

CVE-2026-105016: Microsoft QUIC Remote Code Execution Vulnerability

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
1.7%

Up from 1% on .

EPSS score, percentile 76.6 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
9.8 Critical

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

  • from 10.0.0 to before 10.0.14
  • from 11.0.0 to before 11.0.0-rc.2.26504.105
  • from 8.0.0 to before 8.0.32
  • from 9.0.0 to before 9.0.21
  • from 17.14.0 to before 17.14.42
  • from 18.10.0 to before 18.10.4

and 9 more in the table below

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Microsoft .NET 10.0 runtime
StatusVersions
Affectedfrom 10.0.0 to before 10.0.14
Microsoft .NET 11.0 runtime
StatusVersions
Affectedfrom 11.0.0 to before 11.0.0-rc.2.26504.105
Microsoft .NET 8.0 runtime
StatusVersions
Affectedfrom 8.0.0 to before 8.0.32
Microsoft .NET 9.0 runtime
StatusVersions
Affectedfrom 9.0.0 to before 9.0.21
Microsoft Microsoft Visual Studio 2022 version 17.14
StatusVersions
Affectedfrom 17.14.0 to before 17.14.42
Microsoft Microsoft Visual Studio 2026 version 18.10
StatusVersions
Affectedfrom 18.10.0 to before 18.10.4
Microsoft Windows 11 version 23H2
StatusVersions
Affectedfrom 10.0.22631.0 to before 10.0.22631.7652
Microsoft Windows 11 Version 23H2
StatusVersions
Affectedfrom 10.0.22631.0 to before 10.0.22631.7652
Microsoft Windows 11 Version 24H2
StatusVersions
Affectedfrom 10.0.26100.0 to before 10.0.26100.9711
Microsoft Windows 11 Version 25H2
StatusVersions
Affectedfrom 10.0.26200.0 to before 10.0.26200.9711
Microsoft Windows 11 version 26H1
StatusVersions
Affectedfrom 10.0.28000.0 to before 10.0.28000.3231
Microsoft Windows 11 Version 26H2
StatusVersions
Affectedfrom 10.0.26300.0 to before 10.0.26300.9711
Microsoft Windows Server 2022
StatusVersions
Affectedfrom 10.0.20348.0 to before 10.0.20348.5761
Microsoft Windows Server 2025
StatusVersions
Affectedfrom 10.0.26100.0 to before 10.0.26100.33650
Microsoft Windows Server 2025 (Server Core installation)
StatusVersions
Affectedfrom 10.0.26100.0 to before 10.0.26100.33650

Source: CVE List, as of . About the data.

About this vulnerability

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

Summary: CVE record, as of .

  • CISA has not added CVE-2026-105016 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 13 Oct 2026.
  • The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 1.7% (percentile 76.6), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable yes, technical impact total.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

Microsoft QUIC Remote Code Execution Vulnerability

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

Source: CVE List, as of . About the data.

Weakness

CWE-122
  • CWE-122: Heap-based Buffer Overflow

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

Known exploited Microsoft vulnerabilities

  • CVE-2026-96951: Microsoft Windows Command Injection Vulnerability (added )
  • CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability (added )
  • CVE-2026-81963: Microsoft Windows Link Following Vulnerability (added )
  • CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability (added )
  • CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability (added )