---
title: "CVE-2026-49160: HTTP.sys Denial of Service Vulnerability | CubePath"
description: "Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network."
language: en
source: https://cubepath.com/security/cve/CVE-2026-49160
---

# CVE-2026-49160: HTTP.sys Denial of Service Vulnerability | CubePath

## Description

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

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-49160)

## Key data

### CVSS 3.1 High 7.5

Score published by microsoft in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None      | No account or privileges are needed.                                                |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | None      | No effect on the secrecy of data.                                                   |
| Integrity impact       | None      | No effect on the trustworthiness of data.                                           |
| Availability impact    | High      | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.56595 (56.6% probability)

Percentile

99.1%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA assessment as of Jun 10, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Automatable

yes

Technical impact

partial

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption

## Affected products

Products listed in the CVE record, as the CNA published them.

- Microsoft Windows 10 Version 1607

  - affected: 10.0.14393.0 up to before 10.0.14393.9234
- Microsoft Windows 10 Version 1809

  - affected: 10.0.17763.0 up to before 10.0.17763.8880
- Microsoft Windows 10 Version 21H2

  - affected: 10.0.19044.0 up to before 10.0.19044.7417
- Microsoft Windows 10 Version 22H2

  - affected: 10.0.19045.0 up to before 10.0.19045.7417
- Microsoft Windows 11 version 23H2

  - affected: 10.0.22631.0 up to before 10.0.22631.7219
- Microsoft Windows 11 Version 23H2

  - affected: 10.0.22631.0 up to before 10.0.22631.7219
- Microsoft Windows 11 Version 24H2

  - affected: 10.0.26100.0 up to before 10.0.26100.8655
- Microsoft Windows 11 Version 25H2

  - affected: 10.0.26200.0 up to before 10.0.26200.8655
- Microsoft Windows 11 version 26H1

  - affected: 10.0.28000.0 up to before 10.0.28000.2269
- Microsoft Windows Server 2016

  - affected: 10.0.14393.0 up to before 10.0.14393.9234
- Microsoft Windows Server 2016 (Server Core installation)

  - affected: 10.0.14393.0 up to before 10.0.14393.9234
- Microsoft Windows Server 2019

  - affected: 10.0.17763.0 up to before 10.0.17763.8880
- Microsoft Windows Server 2019 (Server Core installation)

  - affected: 10.0.17763.0 up to before 10.0.17763.8880
- Microsoft Windows Server 2022

  - affected: 10.0.20348.0 up to before 10.0.20348.5256
- Microsoft Windows Server 2025

  - affected: 10.0.26100.0 up to before 10.0.26100.32995
- Microsoft Windows Server 2025 (Server Core installation)

  - affected: 10.0.26100.0 up to before 10.0.26100.32995

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [HTTP.sys Denial of Service Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49160)  (msrc.microsoft.com) vendor-advisory patch

## Timeline

1. ID reserved May 27, 2026
2. Record published Jun 9, 2026
3. Record last updated Sep 24, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:04 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)