Stack-based Buffer Overflow in ActFax Server by ActFax
CVE-2012-10043

9.3CRITICAL

Key Information:

Vendor

Actfax

Status
Server
Vendor
CVE Published:
8 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2012-10043?

A vulnerability exists in ActFax Server version 4.32 within its 'Import Users from File' feature. This issue arises from improper validation of tab-delimited fields in .exp files, allowing an attacker to exploit buffer overflows during CSV parsing. By crafting a malicious .exp file, a user can trigger this flaw using the default ECMA-94 / Latin 1 character set, potentially leading to unauthorized code execution and full system compromise. Successful exploitation requires user initiation.

Affected Version(s)

Server 4.32

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2012-10043 - Proof of Concept

CVE-2012-10043 - Proof of Concept

CVE-2012-10043 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.exploit-db.com/exploits/20915
exploit
https://web.archive.org/web/20130712072809/http://www.pwn...
technical-descriptionexploit

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Craig Freyman
.
CVE-2012-10043 : Stack-based Buffer Overflow in ActFax Server by ActFax