{"cve":"CVE-2026-40358","nvd":{"published":"2026-05-12T18:17:14.543","modified":"2026-10-26T18:10:00.173","status":"Modified","description":"Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4},"cwes":["CWE-416"],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40358"],"products":["microsoft:365_apps","microsoft:office","microsoft:office_long_term_servicing_channel"],"source":"nvd","synced_at":"2026-10-26T18:27:13.530666824+00:00"},"epss":{"cve":"CVE-2026-40358","score":0.00369,"percentile":0.30528,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}