CVE-2016-20046

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.

CVSS v4.0

8.6 HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.15% chance of exploitation in the next 30 days, 4th percentile

Published

2026-03-28

Updated

2026-04-01

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/40203

References

• CVE Record
• NVD entry

Related

• CVE-2016-20045
• CVE-2016-20047
• CVE-2016-20044
• CVE-2016-20048
• CVE-2016-20043
• CVE-2016-20049