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CVE-2018-8493

28
FAUCET Score

CVE-2018-8493 is an information disclosure vulnerability within the Windows TCP/IP stack, affecting various versions of Windows 8.1, Windows 10, and Windows Server, where improper handling of fragmented IP packets can lead to data exposure. With a CVSS score of 7.5 (High), this vulnerability is network-exploitable with low attack complexity, requiring no user interaction or privileges, and can result in significant confidentiality impact. Despite its high severity, there is no evidence of active exploitation, no public exploit code available in common frameworks like Metasploit or ExploitDB, and it has received minimal community discussion or media coverage beyond its initial patch release.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
8.42%
Probability of exploitation in next 30 days
EPSS Percentile
94.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0842 is in the 91st percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (20)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1703 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1703 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1803 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1803 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server, version 1803 (Server Core Installation)
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1709 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1709 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server, version 1709 (Server Core Installation)
View patch
microsoftpatch availablevia msrc
Product: Windows 10 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows 8.1 for 32-bit systems
View patch
microsoftpatch availablevia msrc
Product: Windows 8.1 for x64-based systems
View patch
microsoftpatch availablevia msrc
Product: Windows RT 8.1
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2 (Server Core installation)
View patch

Vendor Advisories (1)

microsoft2018-Oct/CVE-2018-8493Important

Windows TCP/IP Information Disclosure Vulnerability

Oct 9, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8493
PatchVendor Advisory
securityfocus.com / bid/105456
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041843
Third Party AdvisoryVDB Entry