by Kastro
Paper/Archive/CVE-2026-66801

CVE-2026-66801

Microsoft Microsoft GDK — Microsoft Xbox Remote Code Execution Vulnerability

CVSS 9.8
critical.is priorityof 100
29
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Heap-based buffer overflow in Xbox allows an unauthorized attacker to execute code over a network.

Affected

ProductAffectedFixed inSource
Microsoft GDK1.0.0.0 – < 26102610CNA

Scores by source

microsoft (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-66801