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CVE-2026-58611: Xbox Gaming Services Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-08 · updated 2026-10-31
• Weakness: CWE-285

Description

Improper authorization in XBox Gaming Services allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Xbox Gaming Services: before 37.114.10001.0 — fixed in 37.114.10001.0
• Microsoft Xbox Gaming Services: from 19.0.0.0 before 37.114.10001.0 — fixed in 37.114.10001.0

How to fix

Upgrade to a fixed version: Microsoft Xbox Gaming Services 37.114.10001.0; Microsoft Xbox Gaming Services 37.114.10001.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58611

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