Is CVE-2010-20103 in the CISA KEV catalog?

No. CVE-2010-20103 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2010-20103?

CVE-2010-20103 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2010-20103?

CVE-2010-20103 has an EPSS score of 4.75% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2010-20103?

No published fix for CVE-2010-20103 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2010-20103

CRITICALEPSS 91th pctl

9.8

CVSS v3

NVD

Description

A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.

CWE-912

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

4.75%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Exploit3

Third-Party Advisory2

Release Notes1

web.archive.org

Product2

Related Vulnerabilities

Other CWE-912 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-20439	Critical	9.8	92%	KEV	Fix
CVE-2025-34117	Unscored	-	23%	-	-
CVE-2021-24867	Critical	9.8	19%	-	Fix
CVE-2024-6045	High	8.8	6.3%	-	-
CVE-2020-16204	Critical	9.8	5.5%	-	-
CVE-2020-12504	Critical	9.8	3.0%	-	Fix

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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 2026-07-15.