HTTP.sys Denial of Service Vulnerability
53Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 54%
from disclosure to weapon6 days
Published on NVDJun 9
1st PoC+6d
exploitation probability
54%top 1% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Uncontrolled resource consumption in HTTP/2 allows an unauthorized attacker to deny service over a network.
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
Affected products
Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 1
githubgithub.com/dhmosfunk/CVE-2026-49160-CVE-2026-47291-HTTP.sys★ 5⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.