CVE-2026-20843
HIGH EPSS 87.1%
Published Jan 13, 20265mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
Published Jan 13, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago
Description
Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
87.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-284
Affected Products 19
| Vendor | Product | Version | Range |
|---|---|---|---|
| microsoft | windows_10_1607 | * | <10.0.14393.8783 |
| microsoft | windows_10_1607 | * | <10.0.14393.8783 |
| microsoft | windows_10_1809 | * | <10.0.17763.8276 |
| microsoft | windows_10_1809 | * | <10.0.17763.8276 |
| microsoft | windows_10_21h2 | * | <10.0.19044.6809 |
| microsoft | windows_10_22h2 | * | <10.0.19045.6809 |
| microsoft | windows_11_23h2 | * | <10.0.22631.6491 |
| microsoft | windows_11_24h2 | * | <10.0.26100.7623 |
| microsoft | windows_11_25h2 | * | <10.0.26200.7623 |
| microsoft | windows_server_2008 | * | any |
| microsoft | windows_server_2008 | * | any |
| microsoft | windows_server_2008 | r2 | any |
| microsoft | windows_server_2012 | * | any |
| microsoft | windows_server_2012 | r2 | any |
| microsoft | windows_server_2016 | * | <10.0.14393.8783 |
| microsoft | windows_server_2019 | * | <10.0.17763.8276 |
| microsoft | windows_server_2022 | * | <10.0.20348.4648 |
| microsoft | windows_server_2022_23h2 | * | <10.0.25398.2092 |
| microsoft | windows_server_2025 | * | <10.0.26100.32230 |
References 1
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20843
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.