Which products and versions are affected by CVE-2001-1021?

Affected: Ws FTP Server (Progress) versions 2.0.2. The full list is in the CVE brief.

Is CVE-2001-1021 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2001-1021 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2001-1021?

Public exploit code is available.

Is there a fix for CVE-2001-1021?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2001-1021 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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WatchlistHigh

CVE-2001-1021Ws FTP Server Vulnerability

Buffer overflows in WS_FTP 2.02 allow remote attackers to execute arbitrary code via long arguments to (1) DELE, (2) MDTM, (3) MLST, (4) MKD, (5) RMD, (6) RNFR, (7) RNTO, (8) SIZE, (9) STAT, (10) XMKD, or (11) XRMD.

Published Jul 26, 2001 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2001-1021 is a high-severity vulnerability (CVSS 7.5 v2) affecting Ws FTP Server (Progress).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 42% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v2

7.5

AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS (30-day exploit likelihood)

42%

Higher than 98.6% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

40/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

Description

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Ws FTP ServerProgress	2.0.2	n/a

Timeline

Publicly disclosed
Jul 26, 2001
Last updated
Apr 15, 2026

References

patch20010726 def-2001-28 - WS_FTP server 2.0.2 Buffer Overflow and possible DOS
patchipswitch.com · patch-upgrades.html
exploitExploitDB-1158
exploitExploitDB-21036
otherwsftp-long-command-bo(6911)

FAQ

Common Questions.

Buffer overflows in WS_FTP 2.02 allow remote attackers to execute arbitrary code via long arguments to (1) DELE, (2) MDTM, (3) MLST, (4) MKD, (5) RMD, (6) RNFR, (7) RNTO, (8) SIZE, (9) STAT, (10) XMKD, or (11) XRMD.
Affected: Ws FTP Server (Progress) versions 2.0.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2001-1021 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.