Vulnerability in Microsoft Windows 10
CVE-2018-8440
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.184 (97.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.184 · newest: 0.184 · change: 0.000
Affected products
- Microsoft Windows 10 — versions 32-bit Systems, Version 1607 for 32-bit Systems, Version 1607 for x64-based Systems
- Microsoft Windows 10 1607
- Microsoft Windows 10 1703
- Microsoft Windows 10 1709
- Microsoft Windows 10 1803
- Microsoft Windows 10 Servers — versions version 1709 (Server Core Installation), version 1803 (Server Core Installation)
- Microsoft Windows 7 — versions 32-bit Systems Service Pack 1, x64-based Systems Service Pack 1
- Microsoft Windows 7
- Microsoft Windows 8.1 — versions 32-bit systems, x64-based systems
- Microsoft Windows 8.1
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440 (Patch, Vendor Advisory)
- blog.0patch.com/2018/09/comparing-our-micropatch-with.html (Third Party Advisory)
- blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.html (Exploit, Patch, Third Party Advisory)
- www.securitytracker.com/id/1041578 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/105153 (VDB Entry, Third Party Advisory, vdb-entry)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2018-8440?
- CVE-2018-8440 is a high-severity vulnerability in Microsoft Windows 10. CVSS score: 7.8/10. Published 2018-09-13.
- How severe is CVE-2018-8440?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2018-8440 known to be exploited?
- Yes. CVE-2018-8440 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28), indicating it is being actively exploited. 46 public proof-of-concept repositories are indexed.