{"id":"CVE-2026-54988","title":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","summary":"Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","cwe":["CWE-125"],"vendor":"microsoft","product":"365_apps","affected":["365_apps","excel = 2016","microsoft_365","office_2019","office_2021","office_2024","office_online_server < 16.0.10417.20175"],"patched":["office_online_server 16.0.10417.20175"],"published":"2026-07-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T22:10:00.210","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54988","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54988","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-14T17:46:04.548643Z"},"epss":0.00461,"epssPercentile":0.39794,"ingestedAt":"2026-09-08T17:06:31.929Z","slug":"CVE-2026-54988","body":"## Overview\n\nOut-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.\n\n## Affected\n\n- `365_apps`\n- `excel = 2016`\n- `microsoft_365`\n- `office_2019`\n- `office_2021`\n- `office_2024`\n- `office_online_server < 16.0.10417.20175`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `office_online_server 16.0.10417.20175`","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}