CVE-2021-30129

Name: CVE-2021-30129
Creator: NVD / NIST
Published: 2021-07-12T12:15:07.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 3.39%

Last modified Jun 17, 2026

CVE-2021-30129 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A vulnerability in sshd-core of Apache Mina SSHD allows an attacker to overflow the server causing an OutOfMemory error. This issue affects the SFTP and port forwarding features of Apache Mina SSHD version 2.0.0 and later versions. EPSS estimates a 3.39% chance of exploitation in the next 30 days.

Description

A vulnerability in sshd-core of Apache Mina SSHD allows an attacker to overflow the server causing an OutOfMemory error. This issue affects the SFTP and port forwarding features of Apache Mina SSHD version 2.0.0 and later versions. It was addressed in Apache Mina SSHD 2.7.0

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

3.39%

87.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-772

Affected Software

Vendor	Product	Versions
Apache	Sshd	>= 2.0.0, < 2.7.0
Oracle	Banking Payments	14.5
Oracle	Banking Trade Finance	14.5
Oracle	Banking Treasury Management	14.5
Oracle	Communications Cloud Native Core Console	1.9.0
Oracle	Flexcube Universal Banking	>= 14.0.0, <= 14.3.0
Oracle	Flexcube Universal Banking	14.5
Oracle	Middleware Common Libraries And Tools	12.2.1.3.0
Oracle	Middleware Common Libraries And Tools	12.2.1.4.0
Oracle	Middleware Common Libraries And Tools	14.1.1.0.0
Oracle	Oss Support Tools	2.12.42
Oracle	Retail Customer Management And Segmentation Foundation	18.0
Oracle	Retail Customer Management And Segmentation Foundation	19.0

References

http://www.openwall.com/lists/oss-security/2021/07/12/1Mailing List, Third Party Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/red01829efa2a8c893c4baff4f23c9312bd938543a9b8658e172b853b%40%3Cannounce.apache.org%3E
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
http://www.openwall.com/lists/oss-security/2021/07/12/1Mailing List, Third Party Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3EMailing List, Vendor Advisory
https://lists.apache.org/thread.html/red01829efa2a8c893c4baff4f23c9312bd938543a9b8658e172b853b%40%3Cannounce.apache.org%3E
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html

Timeline

Published: Jul 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30129?

How severe is CVE-2021-30129?

CVE-2021-30129 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30129?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30129?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST