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CVE-2021-39144: XStream Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2021-39144
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: XStreamproduct: XStreamRemote code executionOther
What
XStream contains a remote code execution vulnerability that allows an attacker to manipulate the processed input stream.
Who is affected
Users of XStream and products that utilize it, including VMware Cloud Foundation.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update XStream to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2023-03-10
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-39144

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-39144coverage & exploitation statusNVD · CVE.org

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