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8.0

Windows RRAS Integer Overflow Allows Remote Code Execution

CVE-2026-26111
Summary

A flaw in Windows RRAS can allow an attacker to take control of a Windows server. This can happen when a specially crafted packet is sent over the network. To protect your server, apply the latest Windows updates as soon as possible.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software
VendorProductAffected versionsFix available
microsoft windows_server_2012 <= 6.2.9200.25973
microsoft windows_server_2012 r2
microsoft windows_server_2016 <= 10.0.14393.8957
microsoft windows_server_2019 <= 10.0.17763.8511
microsoft windows_server_2022 <= 10.0.20348.4893
microsoft windows_server_2025 <= 10.0.26100.32522
Original title
Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.
Original description
Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.
nvd CVSS3.1 8.8
Vulnerability type
CWE-122 Heap-based Buffer Overflow
CWE-190 Integer Overflow
Published: 10 Mar 2026 · Updated: 14 Mar 2026 · First seen: 11 Mar 2026