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Fencer Vulns
high 7.5

CVE-2026-33096 json

HTTP.sys Denial of Service Vulnerability

published 2026-04-14 6 mo ago modified 2026-10-15 24 d ago also EUVD-2026-22617

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

Patch / fix

  • Microsoft Windows 11 version 23H2 10.0.22631.6936
  • Microsoft Windows 11 Version 24H2 10.0.26100.8246
  • Microsoft Windows 11 Version 25H2 10.0.26200.8246
  • Microsoft Windows 11 version 26H1 10.0.28000.1836
  • Microsoft Windows Server 2022 10.0.20348.5020
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2274
  • Microsoft Windows Server 2025 10.0.26100.32690
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32690

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

1.25% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 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
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Microsoft Windows 11 version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.