HIGH
CVE-2021-46854
CWE-401Published: November 23, 2022· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
Technical Analysis
CVE-2021-46854 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
proftpd1 product(s)
proftpd
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://bugs.gentoo.org/811495
ADVISORYhttps://bugs.gentoo.org/811495
All References (10)
→
http://www.proftpd.org/docs/RELEASE_NOTES-1.3.7eRelease Notes · Vendor Advisory
→
https://bugs.gentoo.org/811495Issue Tracking · Third Party Advisory
→
https://github.com/proftpd/proftpd/issues/1284Exploit · Issue Tracking · Third Party Advisory
→
https://github.com/proftpd/proftpd/pull/1285Third Party Advisory
→
http://www.proftpd.org/docs/RELEASE_NOTES-1.3.7eRelease Notes · Vendor Advisory
→
https://bugs.gentoo.org/811495Issue Tracking · Third Party Advisory
→
https://github.com/proftpd/proftpd/issues/1284Exploit · Issue Tracking · Third Party Advisory
→
https://github.com/proftpd/proftpd/pull/1285Third Party Advisory
Quick Facts
CVE IDCVE-2021-46854
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-401
CISA KEVNo
Affected1 vendor(s)
PublishedNov 23, 2022
Related CVEs (CWE-401)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-46854 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.