ActFax 4.32 Client Importer Buffer Overflow
Published Aug 8, 2025
9.3
CRITICALCVSS 4.0
EPSS 0.40%
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.
Affected products
-
- Version 4.32StatusaffectedConstraints-
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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/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
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Aug 8, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.40% (0.00398) | 31.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.33% (0.00326) | 24.18th | v5 (v2026.06.15) |
| Jun 4, 2026 | 13.43% (0.13427) | 94.33th | v4 (v2025.03.14) |
| Jan 4, 2026 | 4.82% (0.04816) | 89.16th | v4 (v2025.03.14) |
| Dec 8, 2025 | 7.19% (0.07192) | 91.24th | v4 (v2025.03.14) |
| Oct 8, 2025 | 5.46% (0.05455) | 89.68th | v4 (v2025.03.14) |
| Aug 9, 2025 | 0.02% (0.00016) | 2.06th | v4 (v2025.03.14) |
References (5)
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/actfax_import_users_bof.rb exploit
- https://web.archive.org/web/20130712072809/http://www.pwnag3.com/2012/08/actfax-local-privilege-escalation.html technical-descriptionexploit
- https://www.actfax.com/ product
- https://www.exploit-db.com/exploits/20915 exploit
- https://www.vulncheck.com/advisories/actfax-client-importer-buffer-overflow third-party-advisory
Change history (0)
No recorded changes yet.