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Fencer Vulns
medium 5.3

CVE-2018-0833 json

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…

published 2018-02-15 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-1638

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
40.2%
EPSS 40.2% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

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".

Patch / fix

Timeline

  1. Published
  2. First public exploit (EDB-44189)

Exploit prediction

40.16% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-44189 Microsoft Windows 8.1/2012 R2 - SMBv3 Null Pointer Dereference Denial of Service dos, 2018-02-27
  • github.com https://github.com/KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 6.3 AV:N/AC:M/Au:S/C:N/I:N/A:C

Affected products

  • Microsoft Corporation Server Message Block

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.