CVE-2018-8493

Name: CVE-2018-8493
Creator: NVD / NIST
Published: 2018-10-10T13:29:04.073+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 8.42%

Last modified Jun 17, 2026

CVE-2018-8493 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets, aka "Windows TCP/IP Information Disclosure Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers.. EPSS estimates a 8.42% chance of exploitation in the next 30 days.

Description

An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets, aka "Windows TCP/IP Information Disclosure Vulnerability." This affects Windows Server 2012 R2, Windows RT 8.1, Windows Server 2016, Windows 8.1, Windows 10, Windows 10 Servers.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

8.42%

94.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10 1507	All versions
Microsoft	Windows 10 1607	All versions
Microsoft	Windows 10 1703	All versions
Microsoft	Windows 10 1709	All versions
Microsoft	Windows 10 1803	All versions
Microsoft	Windows 8.1	All versions
Microsoft	Windows Server 1709	All versions
Microsoft	Windows Server 1803	All versions
Microsoft	Windows Server 2012	r2
Microsoft	Windows Server 2016	All versions

References

http://www.securityfocus.com/bid/105456Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041843Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8493Patch, Vendor Advisory
http://www.securityfocus.com/bid/105456Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041843Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8493Patch, Vendor Advisory

Timeline

Published: Oct 10, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-8493?

How severe is CVE-2018-8493?

CVE-2018-8493 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 8.42% probability of exploitation in the next 30 days.

How do I fix CVE-2018-8493?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-8493?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST