CVE-2021-46854

HIGHNVD 7.57.5—

7.5

mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 83.1%
KEV: Not listed

Published

November 23, 2022

Last Modified

April 28, 2025

References (10)

cve@mitrehttp://www.proftpd.org/docs/RELEASE_NOTES-1.3.7e
cve@mitrehttps://bugs.gentoo.org/811495
cve@mitrehttps://github.com/proftpd/proftpd/issues/1284
cve@mitrehttps://github.com/proftpd/proftpd/pull/1285
cve@mitrehttps://security.gentoo.org/glsa/202305-03
af854a3a-2127-422b-91ae-364da2661108http://www.proftpd.org/docs/RELEASE_NOTES-1.3.7e
af854a3a-2127-422b-91ae-364da2661108https://bugs.gentoo.org/811495
af854a3a-2127-422b-91ae-364da2661108https://github.com/proftpd/proftpd/issues/1284
af854a3a-2127-422b-91ae-364da2661108https://github.com/proftpd/proftpd/pull/1285
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202305-03

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-401Missing Release of Memory after Effective Lifetime (Memory Leak)

Data Freshness Timeline

(refreshed 10× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 11:38 UTCEG score recompute
2026-05-25 11:38 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-46854?

CVE-2021-46854 is a high vulnerability published on November 23, 2022. mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.

When was CVE-2021-46854 disclosed?

CVE-2021-46854 was first published in the National Vulnerability Database on November 23, 2022, with the most recent update on April 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-46854 actively exploited?

CVE-2021-46854 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-46854?

CVE-2021-46854 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-46854?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-46854, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-46854

📅 Published

🔄 Last Modified

🔗 References (10)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-46854?

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Published

Last Modified

References (10)

Frequently asked(5)

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