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CVE-2026-49791 Microsoft CVE debrief

CVE-2026-49791 is a HIGH severity vulnerability in Windows Routing and Remote Access Service (RRAS) that allows an authorized attacker to elevate privileges locally due to improper link resolution before file access. The CVE record was published on 2026-07-14T17:16:54.720Z and has not been modified since then. This vulnerability exists in the RRAS component of Windows, which is used for remote access and routing. The improper link resolution before file access allows an attacker with local access to elevate their privileges. System administrators and security teams should prioritize patching this vulnerability to prevent potential local privilege escalation attacks.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-20
Advisory published
2026-07-14
Advisory updated
2026-07-20

Who should care

System administrators and security teams responsible for Windows Routing and Remote Access Service (RRAS) should prioritize patching this vulnerability to prevent potential local privilege escalation attacks. This includes operators, platform administrators, vulnerability management teams, and security teams who manage and secure Windows systems.

Technical summary

The vulnerability exists in Windows Routing and Remote Access Service (RRAS) due to improper link resolution before file access. This allows an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity. The affected product is Windows, and the vulnerability is related to the RRAS component. The technical impact is that an attacker can elevate their privileges locally.

Defensive priority

Patching this vulnerability is a high priority due to its potential impact on system security. System administrators should apply the patch as soon as possible to prevent potential attacks. The vulnerability has a high CVSS score, and defenders should review compensating controls for exposed systems while remediation is scheduled and verified. Monitoring system logs for potential exploitation attempts is also recommended.

Recommended defensive actions

  • Apply the patch provided by Microsoft to fix the vulnerability.
  • Review and update system configurations to ensure that Windows Routing and Remote Access Service (RRAS) is properly secured.
  • Monitor system logs for potential exploitation attempts.

Evidence notes

The CVE record and NVD detail provide information on the vulnerability, its severity, and potential impact. Microsoft has provided a patch to fix the vulnerability, which should be applied as soon as possible. The evidence is limited, and defenders should verify the affected scope and vendor guidance. The vulnerability has a CVSS score of 7.1 and is classified as HIGH severity. There is no information on known or unknown affected scope, and defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T17:16:54.720Z and has not been modified since then.