CVE-2026-84011
Windows SMB Client Security Feature Bypass Vulnerability
Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security feature locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Windows SMB Client Security Feature Bypass Vulnerability
Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security feature locally.
- Record
CVE-2026-84011- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C - Weakness
- CWE-863
- Updated
- 2026-11-10
EUVDEUVD-2026-99449
Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security feature locally.
- Record
EUVD-2026-99449- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-vpw4-8hvr-46cq
Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security...
Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security feature locally.
- Record
GHSA-vpw4-8hvr-46cq- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
NVD
Incorrect authorization in Windows SMB Client allows an authorized attacker to bypass a security feature locally.
- Record
CVE-2026-84011- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
- microsoft windows 11 version 23h2
- microsoft windows 11 version 24h2
- microsoft windows 11 version 25h2
- microsoft windows 11 version 26h1
- microsoft windows 11 version 26h2
- microsoft windows server 2022
- microsoft windows server 2025
- microsoft windows server 2025 (server core installation)
- microsoft windows 11 23h2
- microsoft windows 11 24h2
- microsoft windows 11 25h2
- microsoft windows 11 26h1
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History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-84011 is a medium vulnerability (CVSS 5.5) in Microsoft Windows 11 Version 23h2, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 20th percentile. No source names a fixed version.