CVE-2016-20046

HIGH 8.4

zFTP Client 20061220+dfsg3-4.1 Local Buffer Overflow

CVSS Score

8.4

EPSS Score

0.0%

EPSS Percentile

0th

zFTP Client 20061220+dfsg3-4.1 contains a buffer overflow vulnerability in the NAME parameter handling of FTP connections that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an oversized NAME value exceeding the 80-byte buffer allocated in strcpy_chk to overwrite the instruction pointer and execute shellcode with user privileges.

CWE	CWE-787
Vendor	zftp
Product	zftp client
Published	Mar 28, 2026
Last Updated	Apr 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

zFTP / zFTP Client

20061220+dfsg3-4.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/40203 cernlib.web.cern.ch: http://cernlib.web.cern.ch/cernlib/ vulncheck.com: https://www.vulncheck.com/advisories/zftp-client-20061220-dfsg3-local-buffer-overflow

Credits

Juan Sacco - http://www.exploitpack.com -