CVE-2026-20843

CWE-284 — Improper Access Control5 documents5 sources
Severity
7.8HIGH
EPSS
0.0%
top 90.94%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
32
Microsoft Windows 10 Version 1607Microsoft Windows 10 Version 1809Microsoft Windows 10 Version 21h2+29 more
Timeline
PublishedJan 13

Description

Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages31 packages

▶CVEListV5microsoft/windows_server_2008_service_pack_26.0.6003.0 — 6.0.6003.23717
▶CVEListV5microsoft/windows_server_2008_r2_service_pack_16.1.7601.0 — 6.1.7601.28117
▶NVDmicrosoft/windows< 10.0.14393.8783+5

🔴Vulnerability Details

2
GHSA
GHSA-9c4m-f7gw-7x3r: Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally↗2026-01-13
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CVEList
Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability↗2026-01-13
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📋Vendor Advisories

1
Microsoft
Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability↗2026-01-13
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🕵️Threat Intelligence

1
Wiz
CVE-2026-20843 Impact, Exploitability, and Mitigation Steps | Wiz↗
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