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CVE-2021-39144: XStream Remote Code Execution Vulnerability
XStream XStream · in CISA KEV since 2023-03-10
2023-03-10added to KEV
2023-03-31federal remediation due date
98.12%EPSS exploit probability (30 days) 99.9th percentile
8.5 HIGHCVSS 3.1
Unknownknown ransomware use
564days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-94;CWE-502 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVD published | 2021-08-23 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-39144.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.