Is CVE-2010-4221 in the CISA KEV catalog?

No. CVE-2010-4221 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2010-4221?

CVE-2010-4221 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2010-4221?

CVE-2010-4221 has an EPSS score of 91.30% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2010-4221?

Upgrade proftpd-dfsg on debian 11 to 1.3.3a-5 or later.

CVE & CISA-KEV Catalog

CVE-2010-4221

HIGHEPSS 100th pctl

10.0

CVSS v2

NVD

Description

Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to execute arbitrary code via vectors involving a TELNET IAC escape character to a (1) FTP or (2) FTPS server.

CWE-119Buffer Overflow

How to fix

Remediation Available

proftpd-dfsgDebian

Fixed in:1.3.3a-5CVE-2010-4221

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

91.30%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Exploit2

Vendor Advisory1

secunia.com

Other references10

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.