CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2026-88235 Servicing Stack Updates Elevation of Privilege Vulnerability
High (7.8) in microsoft. EPSS 0.3% estimated probability of exploitation activity in the next 30 days.
On this page
Unintended proxy or intermediary ('confused deputy') in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.
Severity
- EPSS
- 0.3% estimated probability of exploitation activity in the next 30 days; 28th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-11. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-441 Unintended Proxy or Intermediary (Confused Deputy)
- OWASP Top 10
- A01:2025 Broken Access Control
- Published
- Modified
- Assigned by
- microsoft (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- microsoft:windows 10 version 1607
- microsoft:windows 10 version 1809
- microsoft:windows 10 version 21h2
- microsoft:windows 10 version 22h2
- microsoft:windows 11 version 23h2
- microsoft:windows server 2016
- microsoft:windows server 2016 (server core installation)
- microsoft:windows server 2019
- microsoft:windows server 2019 (server core installation)
- microsoft:windows server 2022
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Microsoft Windows 10 Version 1607 | from 10.0.14393.0 before 10.0.14393.9681 |
| Microsoft Windows 10 Version 1809 | from 10.0.17763.0 before 10.0.17763.9487 |
| Microsoft Windows 10 Version 21H2 | from 10.0.19044.0 before 10.0.19044.7846 |
| Microsoft Windows 10 Version 22H2 | from 10.0.19045.0 before 10.0.19045.7846 |
| Microsoft Windows 11 version 23H2 | from 10.0.22631.0 before 10.0.22631.7711 |
| Microsoft Windows 11 Version 23H2 | from 10.0.22631.0 before 10.0.22631.7711 |
| Microsoft Windows Server 2016 | from 10.0.14393.0 before 10.0.14393.9681 |
| Microsoft Windows Server 2016 (Server Core installation) | from 10.0.14393.0 before 10.0.14393.9681 |
| Microsoft Windows Server 2019 | from 10.0.17763.0 before 10.0.17763.9487 |
| Microsoft Windows Server 2019 (Server Core installation) | from 10.0.17763.0 before 10.0.17763.9487 |
| Microsoft Windows Server 2022 | from 10.0.20348.0 before 10.0.20348.5870 |
GitHub PoC (unverified)
Repositories on GitHub named after this CVE. Nobody has checked them and they are not scanned: some hold a working proof of concept, some nothing useful, and some malware made to look like one. Read the code before you run any of it.
- crisprss/CVE-2026-88235 10 stars, C, created
One of the most powerful primitives for Windows default configuration LPE
Attack patterns (CAPEC)
- CAPEC-219 XML Routing Detour Attacks Likelihood: High · Severity: Medium
- CAPEC-465 Transparent Proxy Abuse Severity: Medium
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.