How severe is CVE-2021-30129?

CVE-2021-30129 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-30129 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30129?

CVE-2021-30129 primarily affects Apache Sshd. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-30129?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-30129 published?

CVE-2021-30129 was published on 2021-07-12 and last updated on 2026-06-17.

CVE-2021-30129

CVE-2021-30129 is a medium-severity vulnerability in Apache Sshd with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-772.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-772
Affected product: Apache Sshd
Published: 2021-07-12
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2021-30129?: 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
How severe is CVE-2021-30129?: CVE-2021-30129 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-30129 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30129?: CVE-2021-30129 primarily affects Apache Sshd. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-30129?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-30129 published?: CVE-2021-30129 was published on 2021-07-12 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:a:apache:sshd:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_payments:14.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_trade_finance:14.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:banking_treasury_management:14.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_console:1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:flexcube_universal_banking:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:flexcube_universal_banking:14.5:*:*:*:*:*:*:*
cpe:2.3:a:oracle:middleware_common_libraries_and_tools:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:middleware_common_libraries_and_tools:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:middleware_common_libraries_and_tools:14.1.1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:oss_support_tools:2.12.42:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_customer_management_and_segmentation_foundation:18.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:retail_customer_management_and_segmentation_foundation:19.0:*:*:*:*:*:*:*

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