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CVE-2026-105016

Microsoft QUIC Remote Code Execution Vulnerability

No known exploitation. No EPSS score yet. Fixed versions are out.

CVSS 3.19.8CriticalEPSS percentile—No score yetCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products5 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft .NET 10.0Affected: ≥ 10.0.0, < 10.0.14Upgrade to: 10.0.14Stated by: CVE record
  • Microsoft .NET 11.0Affected: ≥ 11.0.0, < 11.0.0-rc.2.26504.105Upgrade to: 11.0.0-rc.2.26504.105Stated by: CVE record
  • Microsoft .NET 8.0Affected: ≥ 8.0.0, < 8.0.32Upgrade to: 8.0.32Stated by: CVE record
  • Microsoft .NET 9.0Affected: ≥ 9.0.0, < 9.0.21Upgrade to: 9.0.21Stated by: CVE record
  • Microsoft Visual Studio 2022 version 17.14Affected: ≥ 17.14.0, < 17.14.42Upgrade to: 17.14.42Stated by: CVE record

Versions as the sources state them. 5 more products have version data. Full version matrix after sign-in

Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

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

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

No EPSS score yet. New CVEs are usually scored within a few days.

Lifecycle

5 events over 0 days, from the signal feeds we watch.

  1. Publishedweakness classified, att&ck mapped, record updated, record updated

Affected products

And 7 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Scored 9.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

In the news

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We'll flag the next CVE, public exploit or patch for .NET 10.0, not every advisory.