How severe is CVE-2026-58611?

CVE-2026-58611 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-58611 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-58611?

CVE-2026-58611 affects Microsoft Xbox Gaming Services. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-58611?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-58611 published?

CVE-2026-58611 was published on 2026-09-08 and last updated on 2026-09-14.

CVE-2026-58611

CVE-2026-58611 is a high-severity vulnerability in Microsoft Xbox Gaming Services with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-285.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-285
Affected product: Microsoft Xbox Gaming Services
Published: 2026-09-08
Last modified: 2026-09-14

Description

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

Frequently asked questions

What is CVE-2026-58611?: Improper authorization in XBox Gaming Services allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-58611?: CVE-2026-58611 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-58611 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-58611?: CVE-2026-58611 affects Microsoft Xbox Gaming Services. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-58611?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-58611 published?: CVE-2026-58611 was published on 2026-09-08 and last updated on 2026-09-14.

References

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

Affected products (1)

cpe:2.3:a:microsoft:xbox_gaming_services:*:*:*:*:*:*:*:*

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