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CVE-2018-8440

Exploited in the wild. In CISA KEV since 2022‑03‑28. A vendor fix is available.

CVSS 3.17.8HighEPSS percentile97th19% chance in 30 daysCISA KEVListedsince 2022-03-28, due 2022-04-18
Public exploit: 2 sourcesFixVendor fixNo build named by the sources

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • Microsoft Windows 7Affected: 32-bit Systems Service Pack 1Upgrade to: not statedAffected: x64-based Systems Service Pack 1Upgrade to: not statedStated by: CVE record
  • Microsoft Windows Server 2012 R2Affected: (Server Core installation)Upgrade to: not statedStated by: CVE record
  • Microsoft Windows RT 8.1Affected: Windows RT 8.1Upgrade to: not statedStated by: CVE record
  • Microsoft Windows Server 2008Affected: 32-bit Systems Service Pack 2Upgrade to: not statedAffected: 32-bit Systems Service Pack 2 (Server Core installation)Upgrade to: not statedAffected: Itanium-Based Systems Service Pack 2Upgrade to: not statedAffected: x64-based Systems Service Pack 2Upgrade to: not stated + 1 more branchStated by: CVE record
  • Microsoft Windows Server 2012Affected: (Server Core installation)Upgrade to: not statedStated by: CVE record

Versions as the sources state them. 5 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS97th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2022-03-28.

US federal agencies must remediate by 2022-04-18.

Known use in ransomware campaigns.

Apply updates per vendor instructions.
Public exploits

2 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

19% chance of exploitation activity in the next 30 days, which ranks it in the 97th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 129 days before any public exploit.

  1. OpenVAS check added
  2. EPSS band changehigh → moderate
  3. Public exploit / PoCsource: github-poc
  4. Patch availablerecord updated
  5. Added to CISA KEVransomware campaign
  6. Publishedweakness classified

Affected products

And 19 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

And 11 more references. See all after sign-in

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for Windows 10, not every advisory. This one: actively exploited.