Description
A stack-based buffer overflow vulnerability exists in ActFax Server version 4.32, specifically in the "Import Users from File" functionality of the client interface. The application fails to properly validate the length of tab-delimited fields in .exp files, leading to unsafe usage of strcpy() during CSV parsing. An attacker can exploit this vulnerability by crafting a malicious .exp file and importing it using the default character set "ECMA-94 / Latin 1 (ISO 8859)". Successful exploitation may result in arbitrary code execution, leading to full system compromise. User interaction is required to trigger the vulnerability.
Exploits (2)
exploitdb
WORKING POC
VERIFIED
by Craig Freyman · pythonlocalwindows
https://www.exploit-db.com/exploits/20915
metasploit
WORKING POC
NORMAL
by Craig Freyman, Brandon Perry, juan vazquez · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/fileformat/actfax_import_users_bof.rb
References (5)
Scores
CVSS v4
9.3
EPSS
0.0558
EPSS Percentile
90.3%
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-121
Status
published
Products (1)
ActFax/Server
4.32
Published
Aug 08, 2025
Tracked Since
Feb 18, 2026