{"cve":"CVE-2023-21529","nvd":{"published":"2023-02-14T20:15:11.743","modified":"2026-08-19T17:18:05.870","status":"Analyzed","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-502"],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529","https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529","https://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations/"],"products":["microsoft:exchange_server"],"source":"nvd","synced_at":"2026-10-19T21:37:38.595364862+00:00"},"epss":{"cve":"CVE-2023-21529","score":0.59294,"percentile":0.99118,"date":"2026-10-31"},"kev":{"cve":"CVE-2023-21529","date_added":"2026-04-13","due_date":"2026-04-27","vendor":"Microsoft","product":"Exchange Server","known_ransomware":true},"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."]}