EIP-2026-119240

PRE-CVE

Valve Software Half-Life 1.1 Client - Connection Routine Buffer Overflow (1)

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-119240. PoCs published by D4rkGr3y.

AI-analyzed exploit summary This is a functional exploit for a buffer overflow vulnerability in the Half-Life client (v1.1.1.0). It sends a maliciously crafted UDP packet to trigger the overflow and execute a port-binding shellcode on the target system.

Description

Valve Software Half-Life 1.1 Client - Connection Routine Buffer Overflow (1)

Exploits (1)

exploitdb WORKING POC VERIFIED
by D4rkGr3y · cremotewindows
https://www.exploit-db.com/exploits/22966

This is a functional exploit for a buffer overflow vulnerability in the Half-Life client (v1.1.1.0). It sends a maliciously crafted UDP packet to trigger the overflow and execute a port-binding shellcode on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Half-Life client v1.1.1.0
No auth needed
Prerequisites: Network access to the target's UDP port 27015 · Target must be running a vulnerable version of the Half-Life client
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026