CVE-2019-1221

HIGH

Internet Explorer - Remote Code Execution via Scripting Engine Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-1221. PoCs published by edxsh.

AI-analyzed exploit summary This repository contains a proof-of-concept exploit for CVE-2019-1221, targeting Internet Explorer 11 32-bit on Windows 10 x64 up to RS5. The exploit leverages VBScript.Encode (CVE-2019-0768) to bypass mitigations and executes `calc` using WinExec.

Description

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'.

Exploits (1)

nomisec WORKING POC 1 stars
by edxsh · poc
https://github.com/edxsh/CVE-2019-1221

This repository contains a proof-of-concept exploit for CVE-2019-1221, targeting Internet Explorer 11 32-bit on Windows 10 x64 up to RS5. The exploit leverages VBScript.Encode (CVE-2019-0768) to bypass mitigations and executes `calc` using WinExec.

Classification
Working Poc 80%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Internet Explorer 11 32-bit on Windows 10 x64 up to RS5
No auth needed
Prerequisites: Target must be running Internet Explorer 11 32-bit on Windows 10 x64 up to RS5 · VBScript must be enabled
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.1541
EPSS Percentile 96.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (1)
microsoft/internet_explorer 11
Published Sep 11, 2019
Tracked Since Feb 18, 2026