{"id":"CVE-2026-78455","title":"Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.","summary":"Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-125"],"vendor":"microsoft","product":"windows_10_1607","affected":["windows_10_1607 < 10.0.14393.9512","windows_10_1809 < 10.0.17763.9245","windows_10_21h2 < 10.0.19044.7725","windows_10_22h2 < 10.0.19045.7725","windows_11_23h2 < 10.0.22631.7582","windows_11_24h2 < 10.0.26100.9445","windows_11_25h2 < 10.0.26200.9445","windows_11_26h1 < 10.0.28000.2954","windows_server_2016 < 10.0.14393.9512","windows_server_2019 < 10.0.17763.9245"],"patched":["windows_10_1607 10.0.14393.9512","windows_10_1809 10.0.17763.9245","windows_10_21h2 10.0.19044.7725","windows_10_22h2 10.0.19045.7725","windows_11_23h2 10.0.22631.7582","windows_11_24h2 10.0.26100.9445","windows_11_25h2 10.0.26200.9445","windows_11_26h1 10.0.28000.2954","windows_server_2016 10.0.14393.9512","windows_server_2019 10.0.17763.9245"],"published":"2026-09-08","updated":"2026-09-11","sourceUpdated":"2026-09-11T20:05:41.790","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78455","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78455","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T19:43:47.683041Z"},"epss":0.00501,"epssPercentile":0.41758,"ingestedAt":"2026-09-08T19:08:49.629Z","slug":"CVE-2026-78455","body":"## Overview\n\nOut-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.\n\n## Affected\n\n- `windows_10_1607 < 10.0.14393.9512`\n- `windows_10_1809 < 10.0.17763.9245`\n- `windows_10_21h2 < 10.0.19044.7725`\n- `windows_10_22h2 < 10.0.19045.7725`\n- `windows_11_23h2 < 10.0.22631.7582`\n- `windows_11_24h2 < 10.0.26100.9445`\n- `windows_11_25h2 < 10.0.26200.9445`\n- `windows_11_26h1 < 10.0.28000.2954`\n- `windows_server_2016 < 10.0.14393.9512`\n- `windows_server_2019 < 10.0.17763.9245`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1607 10.0.14393.9512`\n- `windows_10_1809 10.0.17763.9245`\n- `windows_10_21h2 10.0.19044.7725`\n- `windows_10_22h2 10.0.19045.7725`\n- `windows_11_23h2 10.0.22631.7582`\n- `windows_11_24h2 10.0.26100.9445`\n- `windows_11_25h2 10.0.26200.9445`\n- `windows_11_26h1 10.0.28000.2954`\n- `windows_server_2016 10.0.14393.9512`\n- `windows_server_2019 10.0.17763.9245`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}