HIGH
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
Published Oct 10, 2018
7.5
HIGHCVSS 3.1
EPSS 8.42%
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.
Affected products
-
- Version 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1703 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version x64-based SystemsStatusaffectedConstraints-
- Version
-
- Version version 1709 (Server Core Installation)StatusaffectedConstraints-
- Version version 1803 (Server Core Installation)StatusaffectedConstraints-
- Version
-
- Version 32-bit systemsStatusaffectedConstraints-
- Version x64-based systemsStatusaffectedConstraints-
- Version
-
- Version Windows RT 8.1StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
-
- Version (Server Core installation)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Windows 10 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 10 Servers | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows 8.1 | n/a |
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| Microsoft | Windows RT 8.1 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2012 R2 | n/a |
| |||||||||||||||||||||||||||||||||
| Microsoft | Windows Server 2016 | n/a |
|
OR
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- r2
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
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
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
8.42% 0.08421
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.08421
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 8.42% (0.08421) | 94.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.42% (0.08421) | 94.26th | v5 (v2026.06.15) |
| Apr 26, 2026 | 14.11% (0.14109) | 94.38th | v4 (v2025.03.14) |
| Mar 28, 2026 | 11.79% (0.11790) | 93.66th | v4 (v2025.03.14) |
| Feb 22, 2026 | 10.45% (0.10446) | 93.09th | v4 (v2025.03.14) |
| Feb 1, 2026 | 13.53% (0.13525) | 94.06th | v4 (v2025.03.14) |
| Oct 4, 2025 | 10.43% (0.10428) | 92.94th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.35% (0.06353) | 90.05th | v4 (v2025.03.14) |
| Mar 29, 2025 | 35.27% (0.35269) | 95.44th | v4 (v2025.03.14) |
| Mar 19, 2025 | 6.35% (0.06353) | 89.80th | v4 (v2025.03.14) |
| Mar 17, 2025 | 15.41% (0.15409) | 94.14th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.42% (0.01418) | 87.04th | v3 (v2023.03.01) |
| Sep 19, 2024 | 1.42% (0.01418) | 86.77th | v3 (v2023.03.01) |
| May 29, 2024 | 2.79% (0.02785) | 90.61th | v3 (v2023.03.01) |
| Apr 11, 2024 | 3.21% (0.03208) | 91.06th | v3 (v2023.03.01) |
| Mar 2, 2024 | 3.04% (0.03045) | 90.69th | v3 (v2023.03.01) |
| Nov 8, 2023 | 3.40% (0.03400) | 90.37th | v3 (v2023.03.01) |
| Oct 4, 2023 | 3.45% (0.03451) | 90.34th | v3 (v2023.03.01) |
| Sep 19, 2023 | 3.40% (0.03402) | 90.28th | v3 (v2023.03.01) |
| Sep 3, 2023 | 2.90% (0.02897) | 89.48th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.07% (0.02065) | 87.25th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.42% (0.06416) | 91.03th | v2 (v2022.01.01) |
| Jan 31, 2023 | 6.42% (0.06416) | 90.67th | v2 (v2022.01.01) |
| Jul 17, 2022 | 5.27% (0.05274) | 89.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.00% (0.04004) | 67.82th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.76% (0.08756) | 86.41th | v5 (v2026.06.15) |
| Apr 14, 2021 | 8.76% (0.08756) | 0.00th | v1 |
Weaknesses (0)
No CWE recorded.
References (3)
- http://www.securityfocus.com/bid/105456 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041843 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8493 x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105456 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041843 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8493 | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Oct 10, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8493
CISA Vulnrichment
Updated n/a