What is the CVSS score of CVE-2018-8126?

CVE-2018-8126 has a CVSS 3.0 base score of 8.8 (High). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 5.2%.

Is there a patch available for CVE-2018-8126?

Yes, a patch is available for CVE-2018-8126. Update the affected software to the latest version immediately.

Internet Explorer CVE-2018-8126

HIGH

2018-05-09 secure@microsoft.com

Authentication Bypass Microsoft Internet Explorer

8.8

CVSS 3.0 · NVD

View

Vulnerability Assessment

Impact	CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 5.2% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka "Internet Explorer Security Feature Bypass Vulnerability." This. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

A security feature bypass vulnerability exists when Internet Explorer fails to validate User Mode Code Integrity (UMCI) policies, aka "Internet Explorer Security Feature Bypass Vulnerability." This affects Internet Explorer 11. Affected products include: Microsoft Internet Explorer.

Know when Internet Explorer gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

Threat Intelligence Overview

EPSS Score

5.2%

Top 8% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 5.2%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +5

CVSS: +44

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:microsoft:internet_explorer:11:*:*:*:*:*:*:*

More in Internet Explorer

View all

CVE-2012-1876 CRITICAL Emergency POC

9.3 Jun 12

Microsoft Internet Explorer 6 through 9, and 10 Consumer Preview, does not properly handle objects in memory, which allo

CVE-2014-0307 CRITICAL Emergency POC

9.3 Mar 12

Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code or cause

CVE-2013-0025 CRITICAL Emergency POC

9.3 Feb 13

Use-after-free vulnerability in Microsoft Internet Explorer 8 allows remote attackers to execute arbitrary code via a cr

CVE-2012-1875 CRITICAL Emergency POC

9.3 Jun 12

Microsoft Internet Explorer 8 does not properly handle objects in memory, which allows remote attackers to execute arbit

CVE-2013-3205 CRITICAL Emergency POC

9.3 Sep 11

Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code or cause a denial of service (

CVE-2013-3184 CRITICAL Emergency POC

9.3 Aug 14

Microsoft Internet Explorer 7 through 10 allows remote attackers to execute arbitrary code or cause a denial of service

CVE-2016-3213 HIGH Act Now POC

8.8 Jun 16

The Web Proxy Auto Discovery (WPAD) protocol implementation in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and

CVE-2014-1764 CRITICAL Emergency POC

10.0 Apr 27

Microsoft Internet Explorer 7 through 11 allows remote attackers to execute arbitrary code and bypass a sandbox protecti

CVE-2017-8636 HIGH Act Now POC

7.5 Aug 08

Microsoft browsers in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Serve

CVE-2014-0282 CRITICAL Emergency POC

9.3 Jun 11

Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service

CVE-2016-7287 HIGH Act Now POC

7.5 Dec 20

The scripting engines in Microsoft Internet Explorer 11 and Microsoft Edge allow remote attackers to execute arbitrary c

CVE-2016-0199 HIGH Act Now POC

8.8 Jun 16

Microsoft Internet Explorer 9 through 11 allows remote attackers to execute arbitrary code or cause a denial of service

Same technique Authentication Bypass

View all

CVE-2015-3306 CRITICAL POC

10.0

CVE-2023-22515 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2013-2465 CRITICAL POC

9.8

CVE-2011-3544 CRITICAL POC

9.8

CVE-2022-40684 CRITICAL POC

9.8

CVE-2025-61882 CRITICAL POC

9.8

CVE-2024-0012 CRITICAL POC

9.3

References

Advisories & patches

PATCH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8126 REF http://www.securityfocus.com/bid/103997 REF http://www.securitytracker.com/id/1040846

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back