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Known exploited vulnerability

CVE-2018-8581

highCVSS 3.1 7.4In CISA KEVRansomwareEPSS 28%Published · Microsoft

The short answer

CVE-2018-8581 affects Microsoft Microsoft Exchange Server and is rated high (CVSS 7.4). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-03: attackers are using it, so patch it first. The vendor has linked a patch.

What it is

An elevation of privilege vulnerability exists in Microsoft Exchange Server, aka "Microsoft Exchange Server Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.

Severity

7.4 high

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

Exploited (CISA KEV)

Yes, since Mar 3, 2022

Federal due date Mar 17, 2022

EPSS, next 30 days

28%

Higher than 98% of scored CVEs

How it can be exploited

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

What CISA says to do

Apply updates per vendor instructions.

Affected products

Microsoft Exchange Server. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2018-8581 being exploited?

Yes. CISA added CVE-2018-8581 to its Known Exploited Vulnerabilities catalog on 2022-03-03, with a federal remediation due date of 2022-03-17. CISA lists it as used in ransomware campaigns.

How do I fix CVE-2018-8581?

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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