CVE-2026-83997
Windows Message Queuing Remote Code Execution Vulnerability
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Message Queuing Remote Code Execution Vulnerability
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-83997- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-416
- Updated
- 2026-11-10
EUVDEUVD-2026-73916
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-73916- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-qccp-hfx7-324f
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a...
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
- Record
GHSA-qccp-hfx7-324f- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-83997- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- microsoft windows server 2022
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 10 21h2
- microsoft windows 10 22h2
- microsoft windows 11 23h2
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History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-83997 is a high vulnerability (CVSS 8.1) in Microsoft Windows 10 Version 21h2, published September 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. No source names a fixed version.