CVE-2021-39144CISA KEVEPSS p99.9%

CVE-2021-39144XStream Remote Code Execution Vulnerability

XStream / XStream

Description

XStream contains a remote code execution vulnerability that allows an attacker to manipulate the processed input stream and replace or inject objects that result in the execution of a local command on the server. This vulnerability can affect multiple products, including but not limited to VMware Cloud Foundation.

Scoring

EPSS98.51% probability of exploitation · percentile 99.9% · 2026-06-15T12:03:41Z

CISA KEV entry

Added to KEV: 2023-03-10

(incoming)1

TypeTargetConfidenceTier
KEVEntryXStream Remote Code Execution Vulnerabilitykev-cve-2021-391440%live

Related by meaning· 6

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

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.