CVE-2023-21813

Description

Windows Secure Channel Denial of Service Vulnerability

Overview

State: PUBLISHED
Assigner (CNA): microsoft
CVSS severity: HIGH
CVSS score: 7.5 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Effective score: 7.5 / 10 HIGH source: CNA overview
MSRC score: 7.5 / 10 HIGH MS rating: Important · Denial of Service
CWE(s): CWE-126
Reserved: 2022-12-16
Published: 2023-02-14 08:00 UTC
Last updated: 2023-02-14 08:00 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/21xxx/CVE-2023-21813.json
Linked Threat: CVE-2023-21813 — Windows Secure Channel Denial of Service Vulnerability

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2023-02-14 20:15:16 UTC
NVD last modified: 2026-06-17 05:34:03 UTC
NVD CVSS v3.1: 7.5 / 10 HIGH source: secure@microsoft.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 3.6 / 10
EPSS score: 0.0165 (probability of exploitation in next 30 days)
EPSS percentile: 74.15% vs all CVEs — higher = more likely to be exploited, as of 2026-07-28

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2023-25979
Assigner: microsoft
Published: Feb 14, 2023, 7:33:16 PM
Updated: Jan 1, 2025, 12:41:02 AM
EUVD base score (CVSS 3.1): 7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
EUVD-reported EPSS: 13.7200
Vendors: Microsoft
Products: Windows 10 Version 1607 (10.0.14393.0 <10.0.14393.5717)

Windows Server 2016 (10.0.14393.0 <10.0.14393.5717)

Windows Server 2008 R2 Service Pack 1 (Server Core installation) (6.1.7601.0 <6.1.7601.26366)

Windows 10 Version 1809 (10.0.0 <10.0.17763.4010)

Windows 10 Version 1507 (10.0.10240.0 <10.0.10240.19747)

Windows Server 2019 (Server Core installation) (10.0.17763.0 <10.0.17763.4010)

Windows Server 2019 (10.0.17763.0 <10.0.17763.4010)

Windows 10 Version 21H2 (10.0.19043.0 <10.0.19044.2604)

Windows Server 2016 (Server Core installation) (10.0.14393.0 <10.0.14393.5717)

Windows Server 2012 R2 (Server Core installation) (6.3.9600.0 <6.3.9600.20821)

Windows Server 2012 (6.2.9200.0 <6.2.9200.24116)

Windows Server 2008 Service Pack 2 (6.0.6003.0 <6.0.6003.21915)

Windows Server 2008 Service Pack 2 (Server Core installation) (6.0.6003.0 <6.0.6003.21915)

Windows 10 Version 22H2 (10.0.19045.0 <10.0.19045.2604)

Windows 11 version 21H2 (10.0.0 <10.0.22621.1574)

Windows 10 Version 20H2 (10.0.0 <10.0.19042.2604)

Windows Server 2008 R2 Service Pack 1 (6.1.7601.0 <6.1.7601.26366)

Windows Server 2012 (Server Core installation) (6.2.9200.0 <6.2.9200.24116)

Windows 11 version 22H2 (10.0.22621.0 <10.0.22621.1265)

Windows Server 2022 (10.0.20348.0 <10.0.20348.1547)

Windows Server 2008 Service Pack 2 (6.0.6003.0 <6.0.6003.21915)

Windows 10 Version 1809 (10.0.17763.0 <10.0.17763.4010)

Windows Server 2012 R2 (6.3.9600.0 <6.3.9600.20821)
Aliases: GHSA-49wc-943v-whmw

ENISA description: Windows Secure Channel Denial of Service Vulnerability

EUVD references (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21813

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-11 01:49 UTC (source: CVRF).

MS severity: Important
Impact: Denial of Service
MS CVSS base score: 7.5 / 10 (temporal 6.5)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Exploit assessment: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely;Older Software Release:Exploitation Less Likely;DOS:N/A
Release: 2023-Feb

Microsoft remediations / KB articles (28)

5022840 — Vendor Fix / Security Update (fixed build 10.0.17763.4010)
5022840 — Update
5022842 — Vendor Fix / Security Update (fixed build 10.0.20348.1547)
5022842 — Update
5022921 — Vendor Fix / Security Hotpatch Update (fixed build 10.0.20348.1540)
5022834 — Vendor Fix / Security Update (fixed build 10.0.19042.2604)
5022834 — Update
5022836 — Vendor Fix / Security Update (fixed build 10.0.22621.1574)
5022845 — Vendor Fix / Security Update (fixed build 10.0.22621.1265)
5022845 — Update
5022858 — Vendor Fix / Security Update (fixed build 10.0.10240.19747)
5022838 — Vendor Fix / Security Update (fixed build 10.0.14393.5717)
5022890 — Vendor Fix / Monthly Rollup (fixed build 6.0.6003.21915)
5022890 — Update
5022893 — Vendor Fix / Security Only (fixed build 6.0.6003.21915)
5022893 — Update
5022872 — Vendor Fix / Monthly Rollup (fixed build 6.1.7601.26366)
5022872 — Update
5022874 — Vendor Fix / Security Only (fixed build 6.1.7601.26366)
5022874 — Update
5022903 — Vendor Fix / Monthly Rollup (fixed build 6.2.9200.24116)
5022903 — Update
5022895 — Vendor Fix / Security Only (fixed build 6.2.9200.24116)
5022895 — Update
5022899 — Vendor Fix / Monthly Rollup (fixed build 6.3.9600.20821)
5022899 — Update
5022894 — Vendor Fix / Security Only (fixed build 6.3.9600.20821)
5022894 — Update

Affected products (23)

Vendor	Product	Versions	Platforms
Microsoft	Windows 10 Version 1809	`10.0.17763.0` (affected)	32-bit Systems, x64-based Systems
Microsoft	Windows 10 Version 1809	`10.0.0` (affected)	ARM64-based Systems
Microsoft	Windows Server 2019	`10.0.17763.0` (affected)	x64-based Systems
Microsoft	Windows Server 2019 (Server Core installation)	`10.0.17763.0` (affected)	x64-based Systems
Microsoft	Windows Server 2022	`10.0.20348.0` (affected)	x64-based Systems
Microsoft	Windows 10 Version 20H2	`10.0.0` (affected)	32-bit Systems, ARM64-based Systems
Microsoft	Windows 11 version 21H2	`10.0.0` (affected)	x64-based Systems, ARM64-based Systems
Microsoft	Windows 10 Version 21H2	`10.0.19043.0` (affected)	32-bit Systems, ARM64-based Systems, x64-based Systems
Microsoft	Windows 11 version 22H2	`10.0.22621.0` (affected)	ARM64-based Systems, x64-based Systems
Microsoft	Windows 10 Version 22H2	`10.0.19045.0` (affected)	x64-based Systems, ARM64-based Systems, 32-bit Systems
Microsoft	Windows 10 Version 1507	`10.0.10240.0` (affected)	32-bit Systems, x64-based Systems
Microsoft	Windows 10 Version 1607	`10.0.14393.0` (affected)	32-bit Systems, x64-based Systems
Microsoft	Windows Server 2016	`10.0.14393.0` (affected)	x64-based Systems
Microsoft	Windows Server 2016 (Server Core installation)	`10.0.14393.0` (affected)	x64-based Systems
Microsoft	Windows Server 2008 Service Pack 2	`6.0.6003.0` (affected)	32-bit Systems
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	`6.0.6003.0` (affected)	32-bit Systems, x64-based Systems
Microsoft	Windows Server 2008 Service Pack 2	`6.0.6003.0` (affected)	x64-based Systems
Microsoft	Windows Server 2008 R2 Service Pack 1	`6.1.7601.0` (affected)	x64-based Systems
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	`6.1.7601.0` (affected)	x64-based Systems
Microsoft	Windows Server 2012	`6.2.9200.0` (affected)	x64-based Systems
Microsoft	Windows Server 2012 (Server Core installation)	`6.2.9200.0` (affected)	x64-based Systems
Microsoft	Windows Server 2012 R2	`6.3.9600.0` (affected)	x64-based Systems
Microsoft	Windows Server 2012 R2 (Server Core installation)	`6.3.9600.0` (affected)	x64-based Systems

Affected products — CPE 2.3 (15) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

Windows Secure Channel Denial of Service Vulnerability vendor-advisory

Web references (28)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

5022834 msrc
5022836 msrc
5022838 msrc
5022840 msrc
5022842 msrc
5022845 msrc
5022858 msrc
5022872 msrc
5022874 msrc
5022890 msrc
5022893 msrc
5022894 msrc
5022895 msrc
5022899 msrc
5022903 msrc
MSRC update guide: CVE-2023-21813 msrc
5022834 msrc
5022840 msrc
5022842 msrc
5022845 msrc
5022872 msrc
5022874 msrc
5022890 msrc
5022893 msrc
5022894 msrc
5022895 msrc
5022899 msrc
5022903 msrc

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21813 secure@microsoft.com PatchVendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21813 af854a3a-2127-422b-91ae-364da2661108 PatchVendor Advisory

Remediations (17)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Grammarly: Free AI Writing Assistance

web:www.grammarly.com

Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website.

2026-06-04 14:15 UTC
Developer Program Policy - Play Console Help

web:support.google.com

Your innovation is what drives our shared success, but with it comes responsibility. These Developer Program Policies, along with the Developer Distribution Agreement, ensure that together we continue to deliver the world's most innovative and trusted apps to over a billion people through Google Play. We invite you to explore our policies below.

2026-06-04 14:15 UTC
Stylists Share Items to Never Buy Secondhand - Good Housekeeping

web:www.goodhousekeeping.com

Stylists explain which items to never buy secondhand and why you should skip them. Here's why you shouldn't buy shoes, athletic wear, or other items secondhand.

2026-06-04 14:15 UTC
VirusTotal - Home

web:www.virustotal.com

VirusTotal is a platform for scanning files and URLs for viruses, malware, and other threats using multiple antivirus engines.

2026-06-04 14:15 UTC
Montoya Twinz - YouTube

web:www.youtube.com

New video tomorrow y'all…I have to fix all the mic audio on it 🫩 165 21 Montoya Twinz

2026-06-04 14:15 UTC
ARK's NEW UPDATE Is HERE! - A Special Day for ARK - YouTube

web:www.youtube.com

Today marks a very special day for ARK as the game officially celebrates 11 years since its original launch, and Studio Wildcard has released a brand new upd...

2026-06-04 14:15 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-22 05:47 UTC
Vulnerability Remediation vs. Mitigation: What's the Difference? - Rapid7

web:www.rapid7.com

Remediation vs. mitigation : What are the differences? Once a vulnerability has been discovered, the ideal solution is to remediate it—to fix or patch the vulnerability before it can become a security threat.

2026-05-22 05:47 UTC
Vulnerability Remediation vs. Mitigation: What are the Differences ...

web:www.secure.com

Learn the difference between vulnerability remediation and mitigation , and how a risk-based strategy can strengthen your security posture.

2026-05-22 05:47 UTC
Resolving Sweet32, Birthday Attacks on Windows Servers Via GPO

web:www.experts-exchange.com

Learn more about Resolving Sweet32, Birthday Attacks on Windows Servers Via GPO from the expert community at Experts Exchange

2026-05-22 05:47 UTC
Critical Chrome Vulnerabilities Enables Remote Code Execution Attacks ...

web:cybersecuritynews.com

Google released a critical Chrome update fixing multiple high-risk vulnerabilities that could enable arbitrary code execution.

2026-05-22 05:47 UTC
‎Google Gemini

web:gemini.google.com

Meet Gemini, Google's AI assistant. Get help with writing, planning, brainstorming, and more. Experience the power of generative AI.

2026-05-22 05:47 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-22 05:47 UTC
Android Security Bulletins - Android Open Source Project

web:source.android.com

This Section contains the available Android Security Bulletins, which provide fixes for possible issues affecting Android devices.

2026-05-22 05:47 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-05-22 05:47 UTC
Update Software, Mitigation M1051 - Enterprise | MITRE ATT&CK®

web:attack.mitre.org

This mitigation can be implemented through the following measures: Regular Operating System Updates Implementation: Apply the latest Windows security updates monthly using WSUS (Windows Server Update Services) or a similar patch management solution. Configure systems to check for updates automatically and schedule reboots during maintenance ...

2026-05-22 05:47 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2023-21813.json.

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