CVE-2021-30129: DoS/OOM leak vulnerability in Apache Mina SSHD Server
Vulnerability summary
CVE-2021-30129 is a medium (CVSS 6.5) vulnerability in apache software foundation apache mina sshd. EPSS estimates a 3.05% chance of exploitation in the next 30 days, higher than 87.5% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2Timeline
- 12-07-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · MavenEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
3.05%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.05% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Oracle8 products
- banking_payments14.5
- banking_trade_finance14.5
- banking_treasury_management14.5
- communications_cloud_native_core_console1.9.0
- flexcube_universal_banking≥ 14.0.0, ≤ 14.3.0 | 14.5
Org.apache.sshd2 products
- sshd-core≥ 2.0.0, < 2.7.0
- sshd-mina≥ 2.0.0, < 2.7.0
Apache1 product
- sshd≥ 2.0.0, < 2.7.0
Apache software foundation1 product
- apache mina sshd≥ 2.0.0, < Apache Mina SSHD*
4 vendors · 12 products
References
9 links- www.openwall.com/lists/oss-security/2021/07/12/1Mailing ListX Refsource MLISTWEBThird Party Advisory
