CVE-2001-0187· NVD / CVE Program· CNA mitre

Format string vulnerability in wu-ftp 2.6.1 and earlier, when running with debug mode enabled, allows remote attackers to execute arbitrary

Format string vulnerability in wu-ftp 2.6.1 and earlier, when running with debug mode enabled, allows remote attackers to execute arbitrary commands via a malformed argument that is recorded in a PASV port assignment.

CriticalCVSS 10.0 · v2.0—Proof of concept No fix recorded

pre-auth RCE

Published: Mar 26, 2001
Updated: Jun 16, 2026
EPSS: 5.7% · 93th percentile
CWE: —

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Action score

Plan

Add it to your regular patch cycle.

CVSS: 40 / 40 · 10.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 2 / 30 · 5.7%

Affected systems

Vendor	Product	CPE
washington university	wu-ftpd	cpe:2.3:a:washington_university:wu-ftpd

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

washington university wu-ftpd2.4.1
washington university wu-ftpd2.4.2_beta18
washington university wu-ftpd2.4.2_beta18_vr10
washington university wu-ftpd2.4.2_beta18_vr11
washington university wu-ftpd2.4.2_beta18_vr12
washington university wu-ftpd2.4.2_beta18_vr13
washington university wu-ftpd2.4.2_beta18_vr14
washington university wu-ftpd2.4.2_beta18_vr15
washington university wu-ftpd2.4.2_beta18_vr4
washington university wu-ftpd2.4.2_beta18_vr5
washington university wu-ftpd2.4.2_beta18_vr6
washington university wu-ftpd2.4.2_beta18_vr7
washington university wu-ftpd2.4.2_beta18_vr8
washington university wu-ftpd2.4.2_beta18_vr9
washington university wu-ftpd2.4.2_beta9
washington university wu-ftpd2.4.2_vr16
washington university wu-ftpd2.4.2_vr17
washington university wu-ftpd2.5
washington university wu-ftpd2.6

Same product

washington university: all records

Other highest-scoring records for the same primary product.

CVE-2004-0185Buffer overflow in the skey_challenge function in ftpd.c for wu-ftp daemon (wu-ftpd) 2.6.2 allows remote attackers to cause a denial of serv
42Plan
CVE-1999-0080Certain configurations of wu-ftp FTP server 2.4 use a _PATH_EXECPATH setting to a directory with dangerous commands, such as /bin, which all
41Plan
CVE-2003-1329ftpd.c in wu-ftpd 2.6.2, when running on "operating systems that only allow one non-connected socket bound to the same local address," does
31Monitor
CVE-1999-0955Race condition in wu-ftpd and BSDI ftpd allows remote attackers to gain root access via the SITE EXEC command.
31Monitor
CVE-2001-0935Vulnerability in wu-ftpd 2.6.0, and possibly earlier versions, which is unrelated to the ftpglob bug described in CVE-2001-0550.
30Monitor
CVE-2005-0256The wu_fnmatch function in wu_fnmatch.c in wu-ftpd 2.6.1 and 2.6.2 allows remote attackers to cause a denial of service (CPU exhaustion by r
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Exploit-DB entry	remote	2001-01-23

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCJan 23, 2001-62 d
PublishedMar 26, 2001
TodaySep 30, 2026+9320 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

ftp:patch missing_form

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

No special conditions are required; it is repeatable.

If successful

Confidentiality: C · data can be read
Integrity: C · data or configuration can be modified
Availability: C · the service can be disrupted

Attack complexity: Low
Confidentiality impact: C
Integrity impact: C
Availability impact: C

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records