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CVE-2018-8265

35
FAUCET Score

CVE-2018-8265 is a remote code execution vulnerability in Microsoft Exchange Server, allowing attackers to execute arbitrary code by sending specially crafted email messages. With a CVSS score of 7.8 (High), it requires user interaction (UI:R) but has low attack complexity (AC:L) and can lead to high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Despite its high FAUCET Risk Score of 96/100 and some community discussion, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_21:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
19.63%
Probability of exploitation in next 30 days
EPSS Percentile
97.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1963 is in the 97th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2013 Cumulative Update 21
View patch
microsoftpatch availablevia msrc
Product: Microsoft Exchange Server 2016 Cumulative Update 10
View patch

Vendor Advisories (1)

microsoft2018-Oct/CVE-2018-8265Important

Microsoft Exchange Remote Code Execution Vulnerability

Oct 9, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8265
PatchVendor Advisory
securityfocus.com / bid/105491
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041836
Third Party AdvisoryVDB Entry