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CVE-2018-0956

29
FAUCET Score

CVE-2018-0956 is a denial-of-service vulnerability in the HTTP 2.0 protocol stack (HTTP.sys) affecting Windows 10 and Windows Server 2016. It allows an unauthenticated attacker to cause a denial of service by sending specially crafted HTTP 2.0 requests. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with no user interaction required, leading to high availability impact. While there is no known public exploit code or active exploitation, the vulnerability has garnered some community discussion and media coverage, indicating awareness.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
1511CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:*
1607CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
1703CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:*
1709CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
14.22%
Probability of exploitation in next 30 days
EPSS Percentile
96.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1422 is in the 94th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (14)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1703 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1703 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1511 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1511 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1709 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1709 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server, version 1709 (Server Core Installation)
View patch

Vendor Advisories (1)

microsoft2018-Apr/CVE-2018-0956Important

HTTP/2 Server Denial of Service Vulnerability

Apr 10, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-0956
PatchVendor Advisory
securityfocus.com / bid/103650
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040661
Third Party AdvisoryVDB Entry