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CVE-2021-30129

24
FAUCET Score

CVE-2021-30129 describes an OutOfMemory vulnerability in Apache Mina SSHD versions 2.0.0 and later, affecting its SFTP and port forwarding features, which can be triggered by an attacker overflowing the server. This medium-severity vulnerability (CVSS 6.5) has a low attack complexity and requires low privileges, leading to high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.7.0CPE matchmatch criteria
cpe:2.3:a:apache:sshd:*:*:*:*:*:*:*:*
14.5CPE matchmatch criteria
cpe:2.3:a:oracle:banking_payments:14.5:*:*:*:*:*:*:*
14.5CPE matchmatch criteria
cpe:2.3:a:oracle:banking_trade_finance:14.5:*:*:*:*:*:*:*
14.5CPE matchmatch criteria
cpe:2.3:a:oracle:banking_treasury_management:14.5:*:*:*:*:*:*:*
1.9.0CPE matchmatch criteria
cpe:2.3:a:oracle:communications_cloud_native_core_console:1.9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.39%
Probability of exploitation in next 30 days
EPSS Percentile
87.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0339 is in the 96th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (11)

mavenpatch availablevia ghsa
Product: org.apache.sshd:sshd-minaFixed in: 2.7.0
mavenpatch availablevia ghsa
Product: org.apache.sshd:sshd-coreFixed in: 2.7.0
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7Fixed in: eap7-apache-sshd-0:2.7.0-1.redhat_00001.1.el7eap
View patch
redhatpatch availablevia redhat_api
Product: RHINT Camel-Q 2.2.1
View patch
redhatpatch availablevia redhat_api
Product: RHPAM 7.13.4 asyncFixed in: sshd-core
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8Fixed in: eap7-apache-sshd-0:2.7.0-1.redhat_00001.1.el8eap
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.10Fixed in: sshd-core
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 7Fixed in: sshd-core
View patch
redhatno patchvia redhat_api
Product: Red Hat Integration Camel K 1Fixed in: sshd-sftp
redhatno patchvia redhat_api
Product: Red Hat Integration Camel Quarkus 1Fixed in: sshd-sftp

Vendor Advisories (2)

mavenGHSA-9279-7hph-r3xwhigh

Buffer Overflow in Apache Mina SSHD

Aug 2, 2021
redhatCVE-2021-30129Moderate

mina-sshd-core: Memory leak denial of service in Apache Mina SSHD Server

Jul 12, 2021

References

lists.apache.org / thread.html/r6d4f78e192a0c8eabd671a018da464024642980ecd24096bde6db36f%40%3Cusers.mina.apache.org%3E
Mailing ListVendor Advisory
lists.apache.org / thread.html/red01829efa2a8c893c4baff4f23c9312bd938543a9b8658e172b853b%40%3Cannounce.apache.org%3E
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory
oracle.com / security-alerts/cpujul2022.html
openwall.com / lists/oss-security/2021/07/12/1
Mailing ListThird Party Advisory