Sitecore XP
YES - ON THE CISA KEV LIST
CVE-2021-42237
Sitecore XP Remote Command Execution Vulnerability
overdue since 2022-04-15
Sitecore: 4 entries (0.2% of all KEV entries are from this vendor); 0 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-42237
References
Other KEV entries for this vendor: Sitecore
- CVE-2025-53690 - Multiple Products (2025-09-04)
- CVE-2019-9875 - CMS and Experience Platform (XP) (2025-03-26)
- CVE-2019-9874 - CMS and Experience Platform (XP) (2025-03-26)
Go deeper
KEV deadlines are a governance problem as much as a patching one. TrebSec's AI governance packs help small teams document, assign, and evidence exactly this work.
AI Governance Policy Pack - $79 AI Vendor Workbook - $49 Both packs bundled - $99