How severe is CVE-2023-21769?

CVE-2023-21769 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-21769?

Affected package information for CVE-2023-21769 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2023-21769?

No fixed version has been published for CVE-2023-21769 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-21769 actively exploited in the wild?

No public exploit code has been indexed for CVE-2023-21769 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2023-21769?

CVE-2023-21769 has an EPSS (Exploit Prediction Scoring System) score of 91.5%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2023-21769?

CVE-2023-21769 is classified as Out-of-bounds Read (CWE-125). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2023-21769?

CVE-2023-21769 affects microsoft windows 10 20h2; microsoft windows 10 21h2; microsoft windows 10 22h2; microsoft windows 10 1607, and 8 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2023-21769 published, and has it been updated?

CVE-2023-21769 was published on April 11, 2023 and was last updated on January 1, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2023-21769

HIGH

Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability

Published

Apr 11, 2023

Updated

Jan 1, 2025

Affected

0 pkgs

Patched

None yet

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

91.5%probability of exploitation in next 30 days

Very High Risk100th percentile+43.53%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability

Affected Products

12 products · 14 configurations

windows 10 20h2microsoft

< 10.0.19042.2846

range

windows 10 21h2microsoft

< 10.0.19044.2846

range

windows 10 22h2microsoft

< 10.0.19045.2846

range

windows 10 1607microsoft

< 10.0.14393.5850

range

windows 10 1809microsoft

< 10.0.17763.4252

range

windows 11 21h2microsoft

< 10.0.22000.1817

range

Frequently Asked Questions

Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability

O3 Security · Impact-Aware SCA

Is CVE-2023-21769 in your stack?

O3 detects CVE-2023-21769 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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