HIGHCVSS v3.1 8.5Actively exploited · CISA KEV since 2023-03-10Vulnerability

CVE-2021-39144

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.

Properties

Euvd product
xstream
Vulnerability name
XStream Remote Code Execution Vulnerability
First seen
2025-10-21T23:25:37+00:00
Cvss score
8.5
Epss score
0.98124
Last seen
2026-10-19T12:00:27+00:00
Due date
2023-03-31
Euvd assigner
GitHub_M
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2023-03-10T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2023-03-10
Score
8.5
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
x-stream
Cvss vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.5

Related Entities (41 · showing 25)

AFFECTS_PRODUCT (36 · showing 20)

INVOLVES (1)

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CVE-2021-39144 (CVSS v3.1 8.5) — Ninja Signal Threat Intelligence | Ninja Signal