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CVE-2018-0833

50
FAUCET Score

CVE-2018-0833 is a denial-of-service vulnerability affecting the SMBv2/SMBv3 client in Microsoft Windows 8.1, RT 8.1, and Server 2012 R2, caused by improper handling of specially crafted requests. With a CVSS score of 5.3 (Medium), it has a high availability impact (A:H) and requires low privileges (PR:L) and high attack complexity (AC:H) over the network (AV:N). While not listed in CISA's KEV catalog, public exploit code exists on ExploitDB, and the vulnerability has garnered significant community discussion and media coverage, indicating its relevance.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
r2CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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
Exploitability Score
1.6
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
40.04%
Probability of exploitation in next 30 days
EPSS Percentile
98.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-44189 · Feb 27, 2018
This CVE's current EPSS score of 0.4004 is in the 99th percentile among its peer group of 1,428 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (6)

microsoftpatch availablevia nvd_reference
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-FEB/CVE-2018-0833Moderate

Windows Denial of Service Vulnerability

Feb 13, 2018

References

github.com / KINGSABRI/CVE-in-Ruby/tree/master/CVE-2018-0833
ExploitThird Party Advisory
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-0833
PatchVendor Advisory
exploit-db.com / exploits/44189
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / bid/102924
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040375
Third Party AdvisoryVDB Entry