01 Record

CVE-2018-8581

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

HighKEVPUBLISHEDCNA: microsoft

CNA base score7.4 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

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02 Description

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

03 Exploitation and scoring

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-03-03. Federal remediation due 2022-03-17. Known ransomware campaign use: reported by CISA.

SSVC decision

ExploitationactiveCISA reports credible evidence of active exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

27.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 97.8% of scored records. A rank, not a probability.

NVD base score

7.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published: 2018-11-14 01:00Z7 YR AGO
Last updated: 2025-10-21 23:45Z1 YR AGO
Reserved: 2018-03-14
Assigning CNA: microsoft
Record state: PUBLISHED
Severity: High (CVSS 7.4)
CNA CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses: No CWE assigned
Data version: 5.1
Document digest: ede53cc3182aa94c12b578b9c9efb3b79755d901cf986ddaacd7a49fcaeb1308

05 Affected products

VendorProductVersionsPlatforms

MicrosoftMicrosoft Exchange Server2010, 2013, 2016, 2019—

06 References

www.securitytracker.com1042141http://www.securitytracker.com/id/1042141vdb-entryx_refsource_SECTRACK
www.securityfocus.com105837http://www.securityfocus.com/bid/105837vdb-entryx_refsource_BID
portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581x_refsource_CONFIRM
www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8581government-resource