EIP-2026-118315

PRE-CVE

Bigant Messenger 2.52 - 'AntCore.dll RegisterCom()' Remote Heap Overflow

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-118315. PoCs published by mr_me.

AI-analyzed exploit summary This exploit targets a heap overflow vulnerability in Bigant Messenger's AntCore.dll via the RegisterCom() function. It delivers a malicious HTML page with embedded JavaScript that triggers the overflow and executes shellcode (calc.exe) on the target system.

Description

Bigant Messenger 2.52 - 'AntCore.dll RegisterCom()' Remote Heap Overflow

Exploits (1)

exploitdb WORKING POC VERIFIED
by mr_me · pythonremotewindows
https://www.exploit-db.com/exploits/12417

This exploit targets a heap overflow vulnerability in Bigant Messenger's AntCore.dll via the RegisterCom() function. It delivers a malicious HTML page with embedded JavaScript that triggers the overflow and executes shellcode (calc.exe) on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Bigant Messenger <= v2.52
No auth needed
Prerequisites: Target must visit the attacker-controlled web server · Target must be using a vulnerable version of Bigant Messenger with IE 6/7 on Windows XP SP3
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026