CVE-2018-8581An elevation of privilege vulnerability exists in Microsoft Exchange Server, aka "Microsoft Exchange Server Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Exchange Server. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 17, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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An elevation of privilege vulnerability exists in Microsoft Exchange Server, aka "Microsoft Exchange Server Elevation of Privilege Vulnerability." This affects Microsoft Exchange Server.
- CVSS
- 7.4 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Added to CISA KEV Mar 3, 2022; federal remediation due Mar 17, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 27.36% (percentile 98)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Microsoft Exchange Server microsoft:exchange_server (from the name) | 2010; 2013; 2016; 2019 | CNA record |
microsoft exchange_server microsoft:exchange_server | 2010; 2013; 2016; 2019 | NVD |
References
- http://www.securitytracker.com/id/1042141vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- http://www.securityfocus.com/bid/105837vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8581x-refsource-confirm, patch, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8581us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.