CVE-2018-8302

Microsoft Exchange Memory Corruption Vulnerability

CVE-2018-8302 is fixed in 5 products on 1 platform, first by KB4340733, released August 14, 2018. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
n/a
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.2707
98th percentile

<p>A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the System user. An attacker could then install programs; view, change, or delete data; or create new accounts.</p> <p>Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Exchange server.</p> <p>The security update addresses the vulnerability by correcting how Microsoft Exchange handles objects in memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 23 KB4340733 Aug 14, 2018
Microsoft Exchange Server 2013 Cumulative Update 20 KB4340731 Aug 14, 2018
Microsoft Exchange Server 2013 Cumulative Update 21 KB4340731 Aug 14, 2018
Microsoft Exchange Server 2016 Cumulative Update 10 KB4340731 Aug 14, 2018
Microsoft Exchange Server 2016 Cumulative Update 9 KB4340731 Aug 14, 2018