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Known exploited vulnerability

CVE-2018-8589

highCVSS 3.1 7.8In CISA KEVEPSS 3.0%Published · Microsoft

The short answer

CVE-2018-8589 affects Microsoft Windows Server 2008 and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-05-23: attackers are using it, so patch it first. The vendor has linked a patch.

What it is

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka "Windows Win32k Elevation of Privilege Vulnerability." This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.

Severity

7.8 high

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

Exploited (CISA KEV)

Yes, since May 23, 2022

Federal due date Jun 13, 2022

EPSS, next 30 days

3.0%

Higher than 88% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

Windows Server 2008, Windows 7, Windows Server 2008 R2. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2018-8589 being exploited?

Yes. CISA added CVE-2018-8589 to its Known Exploited Vulnerabilities catalog on 2022-05-23, with a federal remediation due date of 2022-06-13.

How do I fix CVE-2018-8589?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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