Windows Message Queuing Remote Code Execution Vulnerability
Published Sep 8, 2026
8.1
HIGHCVSS 3.1
EPSS 0.71%
Description
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
Affected products
-
- Version 10.0.19044.0StatusaffectedConstraints<10.0.19044.7725
- Version
-
- Version 10.0.19045.0StatusaffectedConstraints<10.0.19045.7725
- Version
-
- Version 10.0.22631.0StatusaffectedConstraints<10.0.22631.7582
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.9445
- Version
-
- Version 10.0.26200.0StatusaffectedConstraints<10.0.26200.9445
- Version
-
- Version 10.0.22631.0StatusaffectedConstraints<10.0.22631.7582
- Version
-
- Version 10.0.28000.0StatusaffectedConstraints<10.0.28000.2954
- Version
-
- Version 10.0.20348.0StatusaffectedConstraints<10.0.20348.5622
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.33438
- Version
-
- Version 10.0.26100.0StatusaffectedConstraints<10.0.26100.33438
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 21H2 | n/a |
| ||||||
| Microsoft | Windows 10 Version 22H2 | n/a |
| ||||||
| Microsoft | Windows 11 Version 23H2 | n/a |
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| Microsoft | Windows 11 Version 24H2 | n/a |
| ||||||
| Microsoft | Windows 11 Version 25H2 | n/a |
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| Microsoft | Windows 11 version 23H2 | n/a |
| ||||||
| Microsoft | Windows 11 version 26H1 | n/a |
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| Microsoft | Windows Server 2022 | n/a |
| ||||||
| Microsoft | Windows Server 2025 | n/a |
| ||||||
| Microsoft | Windows Server 2025 (Server Core installation) | n/a |
|
- < 10.0.19044.7725
- < 10.0.19044.7725
- < 10.0.19044.7725
- < 10.0.19045.7725
- < 10.0.19045.7725
- < 10.0.19045.7725
- < 10.0.22631.7582
- < 10.0.22631.7582
- < 10.0.26100.9445
- < 10.0.26100.9445
- < 10.0.26200.9445
- < 10.0.26200.9445
- < 10.0.28000.2954
- < 10.0.28000.2954
- < 10.0.20348.5622
- < 10.0.26100.33438
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
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
1 other source (NVD) ▾
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Sep 11, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.71% (0.00707) | 51.71th | v5 (v2026.06.15) |
| Sep 9, 2026 | 0.51% (0.00514) | 42.12th | v5 (v2026.06.15) |
References (1)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83997 vendor-advisorypatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83997 | vendor-advisorypatchVendor Advisory |
Change history (0)
No recorded changes yet.