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CVE-2018-8440

HIGH
7.8
CVSS Score
Published: September 13, 2018 at 12:00 AM UTC
Updated: June 17, 2026 at 02:04 AM UTC
11 products affected across 1 vendorWindows Server 2016Windows Server 2012Windows 10 1607

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Severity
HIGH7.8
Exploitation
CISA KEV
Exploit prediction
EPSS 19%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score18.5%

EPSS (Exploit Prediction Scoring System) estimates a 18.5% chance this CVE is exploited in the wild within the next 30 days — higher than 97% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC).

Required Action
Apply updates per vendor instructions.
Ransomware Use
Known
Added to KEV
Mar 28, 2022
Remediation Due
Apr 18, 2022
1653 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-8440

Description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/105153
VDB Entryx_refsource_SECTRACKThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1041578
x_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://blog.0patch.com/2018/09/comparing-our-micropatch-with.html
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8440

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-noinfo

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