# CVE-2010-20119

## Summary

- **CVE ID:** CVE-2010-20119
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-121
- **Published:** Aug 21, 2025
- **Last Modified:** May 15, 2026

## Description

CommuniCrypt Mail versions up to and including 1.16 contains a stack-based buffer overflow vulnerability in its ANSMTP.dll  and AOSMTP.dll  ActiveX controls, specifically within the AddAttachments() method. This method fails to properly validate the length of input strings, allowing data to exceed the bounds of a fixed-size stack buffer. When invoked with an overly long string, the control can corrupt adjacent memory structures, including exception handlers, leading to potential control flow disruption.

## Affected Products

- CommuniCrypt Software — CommuniCrypt Mail (*)
- CommuniCrypt Software — CommuniCrypt Mail (0)

## References

- [CNA](https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/browser/communicrypt_mail_activex.rb)
- [CNA](https://www.exploit-db.com/exploits/12663)
- [CNA](https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=24374)
- [CNA](https://softwarelode.com/4185/details-communicrypt-mail.html)
- [CNA](https://www.fortiguard.com/encyclopedia/ips/23099)
- [CNA](https://www.vulncheck.com/advisories/communicrypt-mail-activex-control-buffer-overflow)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 48.16%
- **EPSS Percentile:** 97.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._