CVE-2021-42237CISA KEVEPSS p99.9%

CVE-2021-42237Sitecore XP Remote Command Execution Vulnerability

Sitecore / XP

Description

Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.

Scoring

CVSS 9.8 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS97.90% probability of exploitation · percentile 99.9% · 2026-07-22T12:00:31Z
Last modified2026-07-09

CISA KEV entry

Added to KEV: 2022-03-25

(incoming)1

TypeTargetConfidenceTier
KEVEntrySitecore XP Remote Command Execution Vulnerabilitykev-cve-2021-422370%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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CVE-2025-53691
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Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
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Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability
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CVE-2025-34511
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.