Stack-Based Buffer Overflow in CommuniCrypt Mail ActiveX Controls
CVE-2010-20119

8.6HIGH

Key Information:

Vendor

Communicrypt Software

Status
Communicrypt Mail
Vendor
CVE Published:
21 August 2025

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 48%

What is CVE-2010-20119?

CommuniCrypt Mail contains a vulnerability in its ActiveX controls, ANSMTP.dll and AOSMTP.dll, specifically within the AddAttachments() method. This vulnerability arises from inadequate validation of input string lengths, which allows data to overflow the bounds of a fixed-size stack buffer. When an excessively long string is provided, it can corrupt adjacent memory structures, potentially compromising program stability and security, including the disruption of control flow and the potential for executing arbitrary code.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

CommuniCrypt Mail * <= 1.16

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-2010-20119 - Proof of Concept

CVE-2010-20119 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.exploit-db.com/exploits/12663
exploit
https://www.broadcom.com/support/security-center/attacksi...
third-party-advisory

EPSS Score

48% chance of being exploited in the next 30 days.

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
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

Lincoln
JSON
.