What is CVE-2026-49160?
Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.
The record classifies CVE-2026-49160 under weakness class CWE-400. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 141 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.5 — HIGH
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 - EPSS (FIRST)
- 48.4% probability of exploitation in the next 30 days, higher than 98.7% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 9.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-06-09, last modified 2026-06-23
Is CVE-2026-49160 being exploited?
Weaponised exploit code for CVE-2026-49160 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.
Affected products and versions
- Microsoft: Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019
How to fix CVE-2026-49160
Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49160. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-49160
1 tracked threat in the Threadlinqs corpus references CVE-2026-49160, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.