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Fencer Intel
critical 9.8

CVE-2026-88234 json

Windows iSCSI Remote Code Execution Vulnerability

published yesterday modified 17h ago also EUVD-2026-121536

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

Release of invalid pointer or reference in Windows iSCSI allows an unauthorized attacker to execute code over a network.

Patch / fix

  • Microsoft Windows Server 2016 10.0.14393.9688
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9688
  • Microsoft Windows Server 2019 10.0.17763.9487
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.9487
  • Microsoft Windows Server 2022 10.0.20348.5870
  • Microsoft Windows Server 2025 10.0.26100.33822
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33822

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3d ago

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-763 Release of Invalid Pointer or Reference

References

Sources

Fencer Intel 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.