CVE-2021-46854
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies...
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
CVE-2021-46854- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-401
- Updated
- 2026-11-02
CVE List
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
CVE-2021-46854- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-401
- Updated
- 2026-11-02
EUVDEUVD-2021-33508
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
EUVD-2021-33508- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-qr96-w82v-r28g
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies...
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
GHSA-qr96-w82v-r28g- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-401
- Updated
- 2026-11-02
OSV
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
CVE-2021-46854- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-46854
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
DEBIAN-CVE-2021-46854- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVOESA-2022-2127
proftpd security update
ProFTPD is an enhanced FTP server with a focus toward simplicity, security, and ease of configuration. It features a very Apache-like configuration syntax, and a highly customizable server infrastructure, including support for multiple 'virtual' FTP servers, anonymous FTP, and permission-based directory visibility.
Security Fix(es):
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.(CVE-2021-46854)
- Record
OESA-2022-2127- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVOESA-2022-2128
proftpd security update
ProFTPD is an enhanced FTP server with a focus toward simplicity, security, and ease of configuration. It features a very Apache-like configuration syntax, and a highly customizable server infrastructure, including support for multiple 'virtual' FTP servers, anonymous FTP, and permission-based directory visibility.
Security Fix(es):
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.(CVE-2021-46854)
- Record
OESA-2022-2128- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-46854
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
- Record
UBUNTU-CVE-2021-46854- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
proftpd-dfsgDebian:12 |
before 1.3.7c+dfsg-1 | 1.3.7c+dfsg-1 |
proftpd-dfsgDebian:13 |
before 1.3.7c+dfsg-1 | 1.3.7c+dfsg-1 |
proftpd-dfsgDebian:14 |
before 1.3.7c+dfsg-1 | 1.3.7c+dfsg-1 |
proftpdopenEuler:20.03-LTS-SP1 |
before 1.3.7a-2.oe1 | 1.3.7a-2.oe1 |
proftpdopenEuler:20.03-LTS-SP3 |
before 1.3.7a-2.oe1 | 1.3.7a-2.oe1 |
proftpd-dfsgUbuntu:18.04:LTS |
All versions, plus listed versions 1.3.5d-11.3.5e-1build1 |
None known |
proftpd-dfsgUbuntu:20.04:LTS |
All versions, plus listed versions 1.3.6-6build21.3.6c-11.3.6c-21.3.6c-2ubuntu0.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-46854 is a high vulnerability (CVSS 7.5) in Proftpd, published November 23, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. Fixed in proftpd-dfsg 1.3.7c+dfsg-1.
References
github.com/proftpd/proftpd/issues/1284
bugs.gentoo.org/811495
proftpd.org/docs/RELEASE_NOTES-1.3.7e
security.gentoo.org/glsa/202305-03
nvd.nist.gov/vuln/detail/CVE-2021-46854
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security-tracker.debian.org/tracker/CVE-2021-46854
openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-2127
ubuntu.com/security/CVE-2021-46854
cve.org/CVERecord?id=CVE-2021-46854