Buffer overflow in Actfax Server
CVE-2012-10043
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.
Vulnerability class: Buffer Overflow
Published · last modified .
EPSS exploit prediction
EPSS: 0.004 (31.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Actfax Server — versions 4.32
Weakness classification (CWE)
Public proof-of-concept exploits
References
- raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/w… (exploit)
- www.exploit-db.com/exploits/20915 (exploit)
- web.archive.org/web/20130712072809/http://www.pwnag3.com/2012/08/actfax-local-p… (technical-description, exploit)
- www.actfax.com/ (product)
- www.vulncheck.com/advisories/actfax-client-importer-buffer-overflow (third-party-advisory)
Frequently asked questions
- What is CVE-2012-10043?
- CVE-2012-10043 is a vulnerability in Actfax Server, classified under Stack-based Buffer Overflow. Published 2025-08-08.
- Is CVE-2012-10043 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.