Overview
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.
https://www.vmware.com/security/advisories/VMSA-2022-0027.html, https://x-stream.github.io/CVE-2021-39144.html; https://nvd.nist.gov/vuln/detail/CVE-2021-39144
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-39144 |
| Vendor / Product | XStream — XStream |
| NVD Published | 2021-08-23 |
| NVD Last Modified | 2025-10-24 |
| CVSS 3.1 Score | 8.5 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
| Severity | HIGH |
| CWE | CWE-94 |
| CISA KEV Added | 2023-03-10 |
| CISA KEV Deadline | 2023-03-31 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2023-03-31.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2023-03-10 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-03-31 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-39144 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |