CVE-2026-20868
HIGH EPSS 67.7%
Published Jan 13, 20265mo ago · Modified Jun 17, 20261w ago
8.8 CVSS 3.1
Published Jan 13, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago
Description
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
67.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-122
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 3
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20868
- vicarius.io https://www.vicarius.io/vsociety/posts/cve-2026-20868-detection-script-heap-based-buffer-overflow-vulnerability-affecting-windows-rras
- vicarius.io https://www.vicarius.io/vsociety/posts/cve-2026-20868-mitigation-script-heap-based-buffer-overflow-vulnerability-affecting-windows-rras
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.