VSFTPD 3.0.3 allows attackers to cause a denial of service due to limited number of connections allowed.
Priority HIGH 72Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
VSFTPD 3.0.3 allows attackers to cause a denial of service due to limited number of connections allowed.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.03213 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vsftpd_project:vsftpd:3.0.3:*:*:*:*:*:*:* | 3.0.3 | Vulnerable | Vsftpd Project |
- cpe:2.3:a:vsftpd_project:vsftpd:3.0.3:*:*:*:*:*:*:* Versions 3.0.3 Vulnerable ·Vsftpd Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-30047
- 2026-10-03 Alias added: GHSA-p8mp-mm84-7pqr
References
More Vsftpd Project Vsftpd vulnerabilities
- TI-2011-02215 vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp. CVSS 3.1CRITICAL 9.8
- TI-2011-00665 The vsf_filename_passes_filter function in ls.c in vsftpd before 2.3.3 allows remote… CVSS 2.0MEDIUM 4.0
- TI-2021-02564 Improper certificate validation in ALPACA CVSS 3.1HIGH 7.4
- TI-2015-01287 Unspecified vulnerability in vsftpd 3.0.2 and earlier allows remote attackers to bypass… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2021-30047 · CVE Program
- CVE-2021-30047 · NVD
- FIRST EPSS
- GHSA-p8mp-mm84-7pqr · GitHub Advisory Database · CC BY 4.0
- CVE-2021-30047 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences