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CVE-2023-21537

HighPublished

Microsoft Message Queuing (MSMQ) Elevation of Privilege Vulnerability

Published: Jan 10, 2023
Updated: Jan 1, 2025
Assigning CNA: microsoft
Evidence observed: Aug 4, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 43.4%
Model date: Oct 17, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Microsoft Message Queuing (MSMQ) Elevation of Privilege Vulnerability

Sources

CVE-2023-21537PoC
PoC of CVE-2023-21537

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