CVE-2021-46854Public exploitNetwork attack vector

Memory disclosure via rounded password buffer copy

Published Nov 23, 2022 · Updated Apr 28, 2025

Information disclosure in ProFTPD mod_radius before 1.3.7c allows remote attackers operating a RADIUS server to read process memory. The module rounds a client-supplied password length to a 16-byte boundary, then copies the rounded byte count and transmits bytes past the password. Exposure requires RADIUS authentication and attacker visibility into the RADIUS server; disclosed data is limited to adjacent process-buffer contents.

CVSS severity7.5
High
EPSS probability1.16%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ProFTPD mod_radius before 1.3.7c allows remote attackers operating a RADIUS server to read process memory. The module rounds a client-supplied password length to a 16-byte boundary, then copies the rounded byte count and transmits bytes past the password. Exposure requires RADIUS authentication and attacker visibility into the RADIUS server; disclosed data is limited to adjacent process-buffer contents.

The record

CVE
CVE-2021-46854
Published
Nov 23, 2022
Updated
Apr 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-401
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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