{"id":"CVE-2021-42237","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-42237","summary":"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine.…","details":"Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.","published":"2021-11-05T10:15:08.240","modified":"2026-07-09T13:57:14.483","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.97904,"percentile":0.99905,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":8,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html"},{"type":"EXPLOIT","url":"https://blog.assetnote.io/2021/11/02/sitecore-rce/"},{"type":"ADVISORY","url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html"},{"type":"EXPLOIT","url":"https://blog.assetnote.io/2021/11/02/sitecore-rce/"},{"type":"ADVISORY","url":"https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T13:57:14.483"}}