CVE-2026-57096 Microsoft CVE debrief

Who should care

Administrators and users of Windows Routing and Remote Access Service (RRAS) should be aware of this vulnerability and take necessary precautions to mitigate the risk. This includes reviewing the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance, and planning vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Technical summary

A heap-based buffer overflow vulnerability exists in Windows Routing and Remote Access Service (RRAS). An authorized attacker can exploit this vulnerability to elevate privileges locally. The vulnerability is caused by improper handling of user input, allowing an attacker to overflow a buffer and execute arbitrary code. The affected product is Windows Routing and Remote Access Service (RRAS).

Defensive priority

High

Recommended defensive actions

• Apply patches or updates provided by Microsoft to vulnerable systems
• Implement compensating controls, such as monitoring and access controls, to reduce the risk of exploitation
• Conduct regular vulnerability assessments and penetration testing to identify and address potential vulnerabilities
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T18:18:34.520Z and was last modified on 2026-07-20T17:31:23.743Z. The NVD entry is currently Analyzed. The vulnerability affects Windows Routing and Remote Access Service (RRAS) and has a CVSS score of 7.8. The evidence is limited, and defenders should verify the affected scope and vendor guidance.

Official resources