CVE-2018-0840

7.5

HIGHCVSS v3.1 Base Score

79.74%

HIGH RiskEPSS (99th percentile)

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, and Internet Explorer and Microsoft Edge in Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.

Published: 2/15/2018

Modified: 11/21/2024

Back to CVE Lookup

Vulnerability Summary

CVSS v3 Score

7.5HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score (Exploitation Probability)

79.74%HIGH Exploitation Risk

99th percentile

This vulnerability has a 79.74% probability of being exploited in the next 30 days, ranking higher than 99% of all scored CVEs.

Related Vulnerabilities

Similar SeverityHIGH

CVE-2026-41091HIGH 7.8

Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.

5/20/2026

CVE-2026-42897HIGH 8.1

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

5/14/2026

CVE-2026-6973HIGH 7.2

An Improper Input Validation in Ivanti EPMM before versions 12.6.1.1, 12.7.0.1, and 12.8.0.1 allows a remotely authenticated user with administrative access to achieve remote code execution.

5/7/2026

CVE-2026-44116HIGH 8.6

OpenClaw before 2026.4.22 contains a server-side request forgery vulnerability in the Zalo plugin's sendPhoto function that fails to validate outbound photo URLs through the SSRF guard. Attackers can bypass SSRF protection by providing malicious photo URLs to the Zalo Bot API, enabling unauthorized access to internal resources.

5/6/2026

CVE-2026-44115HIGH 8.8

OpenClaw before 2026.4.22 contains an exec allowlist analysis vulnerability allowing shell expansion hiding in unquoted heredoc bodies. Attackers can bypass allowlist validation by embedding shell expansion tokens in heredoc bodies to execute unapproved commands at runtime.

5/6/2026

Learn More

CVSS Calculator

View this score breakdown or calculate a custom score

Understanding CVSS Scoring

Learn how severity scores are calculated and what they mean

CVE Prioritization Guide

Best practices for deciding which vulnerabilities to address first

What is a CVE?

Essential guide to Common Vulnerabilities and Exposures

CVE vs CWE Explained

Understand how CVEs relate to underlying weakness types