MEDIUM
The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka "SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability"
Published Feb 15, 2018
5.3
MEDIUMCVSS 3.0
EPSS 39.90%
Description
The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka "SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability".
Affected products
-
- Version Windows 8.1 and RT 8.1 and Windows Server 2012 R2StatusaffectedConstraints-
- 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 Corporation | Server Message Block | n/a |
|
OR
- n/a
- n/a
- r2
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.
No CVSS v3.1 score for this CVE.
5.3 MEDIUM NVD
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
6.3 MEDIUM NVD
AV:N/AC:M/Au:S/C:N/I:N/A:C
Access Vector Network
Access Complexity Medium
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
39.90% 0.39897
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.39897
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (34 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 39.90% (0.39897) | 98.58th | v5 (v2026.06.15) |
| Sep 22, 2026 | 39.90% (0.39897) | 98.56th | v5 (v2026.06.15) |
| Sep 21, 2026 | 34.06% (0.34062) | 98.37th | v5 (v2026.06.15) |
| Sep 6, 2026 | 39.90% (0.39897) | 98.53th | v5 (v2026.06.15) |
| Sep 5, 2026 | 34.06% (0.34062) | 98.33th | v5 (v2026.06.15) |
| Aug 30, 2026 | 39.90% (0.39897) | 98.52th | v5 (v2026.06.15) |
| Aug 28, 2026 | 34.06% (0.34062) | 98.32th | v5 (v2026.06.15) |
| Aug 24, 2026 | 39.90% (0.39897) | 98.51th | v5 (v2026.06.15) |
| Aug 23, 2026 | 34.06% (0.34062) | 98.32th | v5 (v2026.06.15) |
| Jul 27, 2026 | 40.04% (0.40041) | 98.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 41.30% (0.41299) | 98.49th | v5 (v2026.06.15) |
| Nov 21, 2025 | 74.53% (0.74526) | 98.79th | v4 (v2025.03.14) |
| Nov 18, 2025 | 72.84% (0.72840) | 98.84th | v4 (v2025.03.14) |
| Jun 9, 2025 | 74.53% (0.74526) | 98.77th | v4 (v2025.03.14) |
| Mar 17, 2025 | 72.86% (0.72857) | 98.69th | v4 (v2025.03.14) |
| Feb 27, 2025 | 4.03% (0.04031) | 92.14th | v3 (v2023.03.01) |
| Dec 17, 2024 | 2.97% (0.02967) | 90.63th | v3 (v2023.03.01) |
| Oct 28, 2024 | 1.90% (0.01897) | 88.84th | v3 (v2023.03.01) |
| Nov 30, 2023 | 3.00% (0.02997) | 89.84th | v3 (v2023.03.01) |
| Sep 10, 2023 | 3.27% (0.03271) | 90.05th | v3 (v2023.03.01) |
| Aug 17, 2023 | 3.04% (0.03040) | 89.68th | v3 (v2023.03.01) |
| Jul 8, 2023 | 2.66% (0.02655) | 88.90th | v3 (v2023.03.01) |
| Jun 16, 2023 | 5.12% (0.05115) | 91.77th | v3 (v2023.03.01) |
| May 26, 2023 | 3.03% (0.03029) | 89.48th | v3 (v2023.03.01) |
| May 9, 2023 | 2.34% (0.02336) | 88.11th | v3 (v2023.03.01) |
| Apr 3, 2023 | 2.35% (0.02351) | 88.13th | v3 (v2023.03.01) |
| Mar 15, 2023 | 2.86% (0.02860) | 89.15th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.79% (0.02786) | 88.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.32% (0.08318) | 93.55th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.32% (0.08318) | 92.96th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.32% (0.08318) | 82.34th | v2 (v2022.01.01) |
| Feb 3, 2022 | 44.68% (0.44678) | 98.86th | v1 |
| Sep 1, 2021 | 44.68% (0.44678) | 99.47th | v1 |
| Apr 14, 2021 | 44.68% (0.44678) | 0.00th | v1 |
Weaknesses (1)
References (5)
- http://www.securityfocus.com/bid/102924 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040375 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://github.com/KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833 x_refsource_MISCExploitThird Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833 x_refsource_CONFIRMPatchVendor Advisory
- https://www.exploit-db.com/exploits/44189/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/102924 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040375 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://github.com/KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833 | x_refsource_MISCExploitThird Party Advisory | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://www.exploit-db.com/exploits/44189/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Feb 15, 2018
Updated Sep 17, 2024
Reserved Dec 1, 2017
Link CVE-2018-0833
CISA Vulnrichment
Updated n/a