CVE-2021-39144VulnerabilityPublished 03/10/2023Updated 10/24/2026
CVE-2021-39144: XStream Remote Code Execution Vulnerability
Affects XStream XStreamSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 03/10/2023
- KEV deadline
- 03/31/2023
- EPSS
- 98.1% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
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.