Public proof of conceptFix available

CVE-2026-49160

Q: Is CVE-2026-49160 actively exploited?

Active exploitation of CVE-2026-49160 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-49160?

CVE-2026-49160 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

HTTP.sys Denial of Service Vulnerability

A public proof of concept exists; no exploitation attested.

Published2026-06-09
Fixed in10.0.14393.9234
WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.

Timeline

dates in UTC

2026-06-0917:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-49160?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-49160?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft windows 10 1607

Branch	Affected	Fixed in	Source
10.0	< 10.0.14393.9234	10.0.14393.9234	NVD

Microsoft windows 10 1809

Branch	Affected	Fixed in	Source
10.0	< 10.0.17763.8880	10.0.17763.8880	NVD

Microsoft windows 10 21h2

Branch	Affected	Fixed in	Source
10.0	< 10.0.19044.7417	10.0.19044.7417	NVD

9 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Microsoft windows 10 1607 to 10.0.14393.9234

Advisories and patches

msrc.microsoft.comVendor Advisory

Detection

read 2026-10-23 19:25 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifieddhmosfunk/CVE-2026-49160-CVE-2026-47291-HTTP.sys

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-06-10
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score1.3 %2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23
Microsoft MSRCadvisory—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-06-09
Last Modified: 2026-07-23
NVD status: Analyzed
MSRC Title: HTTP.sys Denial of Service Vulnerability

Frequently asked questions

What is CVE-2026-49160?

Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.

Is CVE-2026-49160 actively exploited?

Active exploitation of CVE-2026-49160 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-49160?

CVE-2026-49160 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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