CVE-2023-28241
📛 CVE Title
Windows Secure Socket Tunneling Protocol (SSTP) Denial of Service Vulnerability
Description
Windows Secure Socket Tunneling Protocol (SSTP) 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)
- —
- Reserved
- 2023-03-13
- Published
- 2023-04-11 07:00 UTC
- Last updated
- 2023-04-11 07:00 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/28xxx/CVE-2023-28241.json
- Linked Threat
- CVE-2023-28241 — Windows Secure Socket Tunneling Protocol (SSTP) Denial of Service Vulnerability
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-2023-31949 - Assigner
- microsoft
- Published
- Apr 11, 2023, 7:13:42 PM
- Updated
- Jan 23, 2025, 1:05:04 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
- 14.7000
- Vendors
- Microsoft
- Products
-
Windows Server 2012 R2 (6.3.9600.0 <6.3.9600.20919)Windows Server 2022 (10.0.20348.0 <10.0.20348.1668)Windows 10 Version 1809 (10.0.17763.0 <10.0.17763.4252)Windows Server 2008 R2 Service Pack 1 (6.1.7601.0 <6.1.7601.26466)Windows Server 2008 Service Pack 2 (6.0.6003.0 <6.0.6003.22015)Windows Server 2012 (Server Core installation) (6.2.9200.0 <6.2.9200.24216)Windows Server 2019 (Server Core installation) (10.0.17763.0 <10.0.17763.4252)Windows Server 2008 R2 Service Pack 1 (Server Core installation) (6.1.7601.0 <6.1.7601.26466)Windows Server 2008 Service Pack 2 (Server Core installation) (6.0.6003.0 <6.0.6003.22015)Windows 10 Version 22H2 (10.0.19045.0 <10.0.19045.2846)Windows 11 version 21H2 (10.0.0 <10.0.22000.1817)Windows 10 Version 1607 (10.0.14393.0 <10.0.14393.5850)Windows 10 Version 20H2 (10.0.0 <10.0.19042.2846)Windows Server 2016 (10.0.14393.0 <10.0.14393.5850)Windows 10 Version 21H2 (10.0.19043.0 <10.0.19044.2846)Windows Server 2016 (Server Core installation) (10.0.14393.0 <10.0.14393.5850)Windows 11 version 22H2 (10.0.22621.0 <10.0.22621.1555)Windows Server 2012 R2 (Server Core installation) (6.3.9600.0 <6.3.9600.20919)Windows 10 Version 1809 (10.0.0 <10.0.17763.4252)Windows 10 Version 1507 (10.0.10240.0 <10.0.10240.19869)Windows Server 2012 (6.2.9200.0 <6.2.9200.24216)Windows Server 2019 (10.0.17763.0 <10.0.17763.4252)Windows Server 2008 Service Pack 2 (6.0.6003.0 <6.0.6003.22015)
- Aliases
-
GHSA-6884-2gj5-fx64
ENISA description: Windows Secure Socket Tunneling Protocol (SSTP) Denial of Service Vulnerability
EUVD references (1)
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;DOS:N/A
- Release
- 2023-Apr
Microsoft remediations / KB articles (24)
- 5025229 — Vendor Fix / Security Update (fixed build 10.0.17763.4252)
- 5025229 — Update
- 5025230 — Vendor Fix / Security Update (fixed build 10.0.20348.1668)
- 5025230 — Update
- 5025221 — Vendor Fix / Security Update (fixed build 10.0.19042.2846)
- 5025221 — Update
- 5025224 — Vendor Fix / Security Update (fixed build 10.0.22000.1817)
- 5025224 — Update
- 5025239 — Vendor Fix / Security Update (fixed build 10.0.22621.1555)
- 5025239 — Update
- 5025234 — Vendor Fix / Security Update (fixed build 10.0.10240.19869)
- 5025228 — Vendor Fix / Security Update (fixed build 10.0.14393.5850)
- 5025271 — Vendor Fix / Monthly Rollup (fixed build 6.0.6003.22015)
- 5025271 — Update
- 5025273 — Vendor Fix / Security Only (fixed build 6.0.6003.22015)
- 5025273 — Update
- 5025279 — Vendor Fix / Monthly Rollup (fixed build 6.1.7601.26466)
- 5025279 — Update
- 5025277 — Vendor Fix / Security Only (fixed build 6.1.7601.26466)
- 5025277 — Update
- 5025287 — Vendor Fix / Monthly Rollup (fixed build 6.2.9200.24216)
- 5025272 — Vendor Fix / Security Only (fixed build 6.2.9200.24216)
- 5025285 — Vendor Fix / Monthly Rollup (fixed build 6.3.9600.20919)
- 5025288 — Vendor Fix / Security Only (fixed build 6.3.9600.20919)
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 |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (25)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- 5025221 msrc
- 5025224 msrc
- 5025228 msrc
- 5025229 msrc
- 5025230 msrc
- 5025234 msrc
- 5025239 msrc
- 5025271 msrc
- 5025272 msrc
- 5025273 msrc
- 5025277 msrc
- 5025279 msrc
- 5025285 msrc
- 5025287 msrc
- 5025288 msrc
- MSRC update guide: CVE-2023-28241 msrc
- 5025221 msrc
- 5025224 msrc
- 5025229 msrc
- 5025230 msrc
- 5025239 msrc
- 5025271 msrc
- 5025273 msrc
- 5025277 msrc
- 5025279 msrc
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:www.oracle.com
Critical Security Patch Updates Critical Security Patch Updates provide security patches for supported Oracle on-premises products. A Critical Security Patch Update provides targeted, high-priority security fixes in a smaller, more focused format, making them easier to apply with minimal disruption.
2026-06-10 00:58 UTC -
web:www.cisa.gov
If vulnerabilities cannot be remediated within the recommended timeframes, develop a remediation plan for action and coordination across the organization. The remediation plan should include: Vulnerability remediation constraints Interim mitigation actions to overcome constraints Final actions required to remediate vulnerability
2026-06-10 00:58 UTC -
web:securityboulevard.com
Organizations must decide how to tackle vulnerabilities—through remediation , mitigation , or a combination of both. But which strategy is more effective? This blog explores the nuances of vulnerability remediation vs mitigation , their respective benefits, and how to choose the right approach.
2026-06-10 00:58 UTC -
web:tuxcare.com
It includes discovering vulnerabilities, evaluating their potential impact, prioritizing remediation efforts (including patching), and confirming the fixes. Patch Management Patch management, on the other hand, is the act of applying the necessary updates to fix known vulnerabilities. It's a critical component of vulnerability management.
2026-06-10 00:58 UTC -
web:www.manageengine.com
Explore known issues and workarounds for Microsoft patches in Patch Manager Plus — including update failures, PowerShell Direct issues, and Office 365 deployment errors.
2026-06-10 00:58 UTC -
web:www.veeam.com
When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information.
2026-06-10 00:58 UTC -
web:heimdalsecurity.com
Explore six essential patch management best practices for 2026 to keep your systems secure, up to date, and protected from vulnerabilities.
2026-06-10 00:58 UTC -
web:www.pcworld.com
This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.
2026-05-22 06:12 UTC -
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 06:12 UTC -
web:www.techrepublic.com
Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.
2026-05-22 06:12 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-22 06:12 UTC -
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 06:12 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.
2026-05-22 06:12 UTC -
web:www.cisa.gov
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework.How to use the KEV ...
2026-05-22 06:12 UTC -
web:www.cve.org
At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures
2026-05-22 06:12 UTC -
web:www.forbes.com
Microsoft has confirmed an emergency security update as CISA warns that two new Defender zero-days are being exploited by attackers.
2026-05-22 06:12 UTC -
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 06:12 UTC
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Raw JSON
The full cvelistV5 record. Download as CVE-2023-28241.json.
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