CVE-2021-39144

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-03-10. Federal remediation due 2023-03-31.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

98.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.

NVD base score

8.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-08-23 00:00Z5 YR AGO

Last updated

2025-10-21 23:25Z1 YR AGO

Reserved

2021-08-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base
• CWE-502Deserialization of Untrusted DataBase
• CWE-306Missing Authentication for Critical FunctionBase

Data version

5.1

Document digest

c9062b578ad1bb678bf1cbc04e17d4f64be753700969287ac1652e0395a2134c

• github.comhttps://github.com/x-stream/xstream/security/advisories/GHSA-j9h8-phrw-h4fh
• x-stream.github.iohttps://x-stream.github.io/CVE-2021-39144.html
• lists.debian.org[debian-lts-announce] 20210929 [SECURITY] [DLA 2769-1] libxstream-java security updatehttps://lists.debian.org/debian-lts-announce/2021/09/msg00017.htmlmailing-list
• lists.fedoraproject.orgFEDORA-2021-fbad11014ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-d894ca87dchttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-5e376c0ed9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/vendor-advisory
• www.debian.orgDSA-5004https://www.debian.org/security/2021/dsa-5004vendor-advisory
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.html
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210923-0003/
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.html
• packetstormsecurity.comhttp://packetstormsecurity.com/files/169859/VMware-NSX-Manager-XStream-Unauthenticated-Remote-Code-Execution.html
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39144government-resource