MSRC_CVE-2026-20816
Vulnerability from csaf_microsoft - Published: 2026-01-13 08:00 - Updated: 2026-01-13 08:00| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23717
Windows Server 2008 for 32-bit Systems Service Pack 2
|
6.0.6003.23717 | ||
|
Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23717
Windows Server 2008 for x64-based Systems Service Pack 2
|
6.0.6003.23717 | ||
|
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23717
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
|
6.0.6003.23717 | ||
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.28117
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
|
6.1.7601.28117 | ||
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.28117
Windows Server 2008 R2 for x64-based Systems Service Pack 1
|
6.1.7601.28117 | ||
|
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23717
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
|
6.0.6003.23717 | ||
|
Windows Server 2012 6.2.9200.25868
Windows Server 2012
|
6.2.9200.25868 | ||
|
Windows Server 2012 (Server Core installation) 6.2.9200.25868
Windows Server 2012 (Server Core installation)
|
6.2.9200.25868 | ||
|
Windows Server 2012 R2 6.3.9600.22968
Windows Server 2012 R2
|
6.3.9600.22968 | ||
|
Windows Server 2012 R2 (Server Core installation) 6.3.9600.22968
Windows Server 2012 R2 (Server Core installation)
|
6.3.9600.22968 | ||
|
Windows Server 2016 10.0.14393.8783
Windows Server 2016
|
10.0.14393.8783 | ||
|
Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8783
Windows 10 Version 1607 for 32-bit Systems
|
10.0.14393.8783 | ||
|
Windows 10 Version 1607 for x64-based Systems 10.0.14393.8783
Windows 10 Version 1607 for x64-based Systems
|
10.0.14393.8783 | ||
|
Windows Server 2016 (Server Core installation) 10.0.14393.8783
Windows Server 2016 (Server Core installation)
|
10.0.14393.8783 | ||
|
Windows 10 Version 1809 for 32-bit Systems 10.0.17763.8276
Windows 10 Version 1809 for 32-bit Systems
|
10.0.17763.8276 | ||
|
Windows 10 Version 1809 for x64-based Systems 10.0.17763.8276
Windows 10 Version 1809 for x64-based Systems
|
10.0.17763.8276 | ||
|
Windows Server 2019 10.0.17763.8276
Windows Server 2019
|
10.0.17763.8276 | ||
|
Windows Server 2019 (Server Core installation) 10.0.17763.8276
Windows Server 2019 (Server Core installation)
|
10.0.17763.8276 | ||
|
Windows Server 2022 10.0.20348.4648
Windows Server 2022
|
10.0.20348.4648 | ||
|
Windows Server 2022 (Server Core installation) 10.0.20348.4648
Windows Server 2022 (Server Core installation)
|
10.0.20348.4648 | ||
|
Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.6809
Windows 10 Version 21H2 for 32-bit Systems
|
10.0.19044.6809 | ||
|
Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.6809
Windows 10 Version 21H2 for ARM64-based Systems
|
10.0.19044.6809 | ||
|
Windows 10 Version 21H2 for x64-based Systems 10.0.19044.6809
Windows 10 Version 21H2 for x64-based Systems
|
10.0.19044.6809 | ||
|
Windows 10 Version 22H2 for x64-based Systems 10.0.19045.6809
Windows 10 Version 22H2 for x64-based Systems
|
10.0.19045.6809 | ||
|
Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.6809
Windows 10 Version 22H2 for ARM64-based Systems
|
10.0.19045.6809 | ||
|
Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.6809
Windows 10 Version 22H2 for 32-bit Systems
|
10.0.19045.6809 | ||
|
Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.6491
Windows 11 Version 23H2 for ARM64-based Systems
|
10.0.22631.6491 | ||
|
Windows 11 Version 23H2 for x64-based Systems 10.0.22631.6491
Windows 11 Version 23H2 for x64-based Systems
|
10.0.22631.6491 | ||
|
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2092
Windows Server 2022, 23H2 Edition (Server Core installation)
|
10.0.25398.2092 | ||
|
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.7623
Windows 11 Version 24H2 for ARM64-based Systems
|
10.0.26100.7623 | ||
|
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.7623
Windows 11 Version 24H2 for x64-based Systems
|
10.0.26100.7623 | ||
|
Windows Server 2025 10.0.26100.32230
Windows Server 2025
|
10.0.26100.32230 | ||
|
Windows Server 2025 (Server Core installation) 10.0.26100.32230
Windows Server 2025 (Server Core installation)
|
10.0.26100.32230 | ||
|
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.7623
Windows 11 Version 25H2 for ARM64-based Systems
|
10.0.26200.7623 | ||
|
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.7623
Windows 11 Version 25H2 for x64-based Systems
|
10.0.26200.7623 |
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows 11 Version 25H2 for x64-based Systems <10.0.26200.7623
Windows 11 Version 25H2 for x64-based Systems
|
<10.0.26200.7623 |
Vendor Fix
fix
|
|
|
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.7623
Windows 11 Version 25H2 for ARM64-based Systems
|
<10.0.26200.7623 |
Vendor Fix
fix
|
|
|
Windows Server 2025 (Server Core installation) <10.0.26100.32230
Windows Server 2025 (Server Core installation)
|
<10.0.26100.32230 |
Vendor Fix
fix
|
|
|
Windows Server 2025 <10.0.26100.32230
Windows Server 2025
|
<10.0.26100.32230 |
Vendor Fix
fix
|
|
|
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.7623
Windows 11 Version 24H2 for x64-based Systems
|
<10.0.26100.7623 |
Vendor Fix
fix
|
|
|
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.7623
Windows 11 Version 24H2 for ARM64-based Systems
|
<10.0.26100.7623 |
Vendor Fix
fix
|
|
|
Windows Server 2022, 23H2 Edition (Server Core installation) <10.0.25398.2092
Windows Server 2022, 23H2 Edition (Server Core installation)
|
<10.0.25398.2092 |
Vendor Fix
fix
|
|
|
Windows 11 Version 23H2 for x64-based Systems <10.0.22631.6491
Windows 11 Version 23H2 for x64-based Systems
|
<10.0.22631.6491 |
Vendor Fix
fix
|
|
|
Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.6491
Windows 11 Version 23H2 for ARM64-based Systems
|
<10.0.22631.6491 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for 32-bit Systems <10.0.19045.6809
Windows 10 Version 22H2 for 32-bit Systems
|
<10.0.19045.6809 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for ARM64-based Systems <10.0.19045.6809
Windows 10 Version 22H2 for ARM64-based Systems
|
<10.0.19045.6809 |
Vendor Fix
fix
|
|
|
Windows 10 Version 22H2 for x64-based Systems <10.0.19045.6809
Windows 10 Version 22H2 for x64-based Systems
|
<10.0.19045.6809 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for x64-based Systems <10.0.19044.6809
Windows 10 Version 21H2 for x64-based Systems
|
<10.0.19044.6809 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for ARM64-based Systems <10.0.19044.6809
Windows 10 Version 21H2 for ARM64-based Systems
|
<10.0.19044.6809 |
Vendor Fix
fix
|
|
|
Windows 10 Version 21H2 for 32-bit Systems <10.0.19044.6809
Windows 10 Version 21H2 for 32-bit Systems
|
<10.0.19044.6809 |
Vendor Fix
fix
|
|
|
Windows Server 2022 (Server Core installation) <10.0.20348.4648
Windows Server 2022 (Server Core installation)
|
<10.0.20348.4648 |
Vendor Fix
fix
|
|
|
Windows Server 2022 <10.0.20348.4648
Windows Server 2022
|
<10.0.20348.4648 |
Vendor Fix
fix
|
|
|
Windows Server 2019 (Server Core installation) <10.0.17763.8276
Windows Server 2019 (Server Core installation)
|
<10.0.17763.8276 |
Vendor Fix
fix
|
|
|
Windows Server 2019 <10.0.17763.8276
Windows Server 2019
|
<10.0.17763.8276 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1809 for x64-based Systems <10.0.17763.8276
Windows 10 Version 1809 for x64-based Systems
|
<10.0.17763.8276 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1809 for 32-bit Systems <10.0.17763.8276
Windows 10 Version 1809 for 32-bit Systems
|
<10.0.17763.8276 |
Vendor Fix
fix
|
|
|
Windows Server 2016 (Server Core installation) <10.0.14393.8783
Windows Server 2016 (Server Core installation)
|
<10.0.14393.8783 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1607 for x64-based Systems <10.0.14393.8783
Windows 10 Version 1607 for x64-based Systems
|
<10.0.14393.8783 |
Vendor Fix
fix
|
|
|
Windows 10 Version 1607 for 32-bit Systems <10.0.14393.8783
Windows 10 Version 1607 for 32-bit Systems
|
<10.0.14393.8783 |
Vendor Fix
fix
|
|
|
Windows Server 2016 <10.0.14393.8783
Windows Server 2016
|
<10.0.14393.8783 |
Vendor Fix
fix
|
|
|
Windows Server 2012 R2 (Server Core installation) <6.3.9600.22968
Windows Server 2012 R2 (Server Core installation)
|
<6.3.9600.22968 |
Vendor Fix
fix
|
|
|
Windows Server 2012 R2 <6.3.9600.22968
Windows Server 2012 R2
|
<6.3.9600.22968 |
Vendor Fix
fix
|
|
|
Windows Server 2012 (Server Core installation) <6.2.9200.25868
Windows Server 2012 (Server Core installation)
|
<6.2.9200.25868 |
Vendor Fix
fix
|
|
|
Windows Server 2012 <6.2.9200.25868
Windows Server 2012
|
<6.2.9200.25868 |
Vendor Fix
fix
|
|
|
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) <6.0.6003.23717
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
|
<6.0.6003.23717 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 <6.1.7601.28117
Windows Server 2008 R2 for x64-based Systems Service Pack 1
|
<6.1.7601.28117 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) <6.1.7601.28117
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
|
<6.1.7601.28117 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) <6.0.6003.23717
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
|
<6.0.6003.23717 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for x64-based Systems Service Pack 2 <6.0.6003.23717
Windows Server 2008 for x64-based Systems Service Pack 2
|
<6.0.6003.23717 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for 32-bit Systems Service Pack 2 <6.0.6003.23717
Windows Server 2008 for 32-bit Systems Service Pack 2
|
<6.0.6003.23717 |
Vendor Fix
fix
Vendor Fix
fix
|
{
"document": {
"acknowledgments": [
{
"names": [
"\u003ca href=\"https://infosec.exchange/@jagotu\"\u003eJaGoTu\u003c/a\u003e with \u003ca href=\"https://www.dcit.cz/\"\u003eDCIT, a.s.\u003c/a\u003e"
]
}
],
"aggregate_severity": {
"namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Public",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en-US",
"notes": [
{
"category": "general",
"text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
},
{
"category": "general",
"text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
"title": "Customer Action"
}
],
"publisher": {
"category": "vendor",
"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
"namespace": "https://msrc.microsoft.com"
},
"references": [
{
"category": "self",
"summary": "CVE-2026-20816 Windows Installer Elevation of Privilege Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20816"
},
{
"category": "self",
"summary": "CVE-2026-20816 Windows Installer Elevation of Privilege Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-20816.json"
},
{
"category": "external",
"summary": "Microsoft Exploitability Index",
"url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
},
{
"category": "external",
"summary": "Microsoft Support Lifecycle",
"url": "https://support.microsoft.com/lifecycle"
},
{
"category": "external",
"summary": "Common Vulnerability Scoring System",
"url": "https://www.first.org/cvss"
}
],
"title": "Windows Installer Elevation of Privilege Vulnerability",
"tracking": {
"current_release_date": "2026-01-13T08:00:00.000Z",
"generator": {
"date": "2026-01-13T18:03:51.655Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2026-20816",
"initial_release_date": "2026-01-13T08:00:00.000Z",
"revision_history": [
{
"date": "2026-01-13T08:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
}
],
"status": "final",
"version": "1"
}
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 6.8,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
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"category": "impact",
"details": "Elevation of Privilege"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely"
}
],
"title": "Windows Installer Elevation of Privilege Vulnerability"
}
]
}
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.