Microsoft Exchange Server
CVE-2018-8154 — Microsoft Exchange Memory Corruption Vulnerability
Executive Summary
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. Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Exchange server. The security update addresses the vulnerability by correcting how Microsoft Exchange handles objects in memory.
Overview
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
0.23827
probability of exploitation in the next 30 days
0.97623 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
7 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 21 | 4091243 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2010 Service Pack 3 Update Rollup 24 | 4458321 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2013 Cumulative Update 19 | 4092041 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2013 Cumulative Update 20 | 4092041 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2013 Service Pack 1 | 4092041 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 8 | 4092041 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft Exchange Server 2016 Cumulative Update 9 | 4092041 (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
4091243 |
Security Update | Maybe |
4458321 |
Security Update | Maybe |
4092041 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
References
On This Page