Patch Forecast
Amber warning
Patch this week.

CVE-2026-102192

Integer underflow (wrap or wraparound) in Windows Failover Cluster allows an unauthorized attacker…

Risk score
74/100
CVSS
7.5 v3.1
Exploit chance (30 days)
1.3%
Published
13 Oct 2026

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What to know

What it is
Integer underflow (wrap or wraparound) in Windows Failover Cluster allows an unauthorized attacker to deny service over a network.
Affected
Microsoft Windows Server 2019
Fix
Apply the vendor's security update; see the linked advisory.
Exploitation
No known exploitation

Story map

Story map: Microsoft Windows Server 2019THE FLAWSTHE FIXCVE-2026-102192Integer underflow (wrap orwraparound) in WindowsFailover Cluster allows an…CVSS 7.5 · EPSS 1%CVE-2026-88102Use-after-freeCVSS 9.8 · EPSS 1%CVE-2026-96945Uncaught exception in WindowsFailover Cluster allows anunauthorized attacker to deny…CVSS 7.5 · EPSS 1%CVE-2026-88099Uncaught exception in WindowsFailover Cluster allows anunauthorized attacker to deny…CVSS 5.9 · EPSS 1%FixApply the vendor's securityupdate; see the linked advisory.Who is exposedMicrosoft Windows Server2019RED · ACT TODAYMicrosoftWindows Server…Use after free in WindowsFailover Cluster allows anunauthorized attacker toexecute code over a network.Where it standsNo known exploitationCONNECTS TOSame weaknessCWE-191 (CWE-191)57 other warnings in 30 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Microsoft Windows Server 2019: Red, act today. Use after free in Windows Failover Cluster allows an unauthorized attacker to execute code over a network.

The flaws

  • CVE-2026-102192: Integer underflow (wrap or wraparound) in Windows Failover Cluster allows an unauthorized attacker… (CVSS 7.5 · EPSS 1%)
  • CVE-2026-88102: Use-after-free (CVSS 9.8 · EPSS 1%)
  • CVE-2026-96945: Uncaught exception in Windows Failover Cluster allows an unauthorized attacker to deny service over… (CVSS 7.5 · EPSS 1%)
  • CVE-2026-88099: Uncaught exception in Windows Failover Cluster allows an unauthorized attacker to deny service over… (CVSS 5.9 · EPSS 1%)

The fix

Fix: Apply the vendor's security update; see the linked advisory.

Who is exposed: Microsoft Windows Server 2019

Where it stands

  • No known exploitation

Connects to

Why it is Amber

  • CVSS 7.5 high
  • Remotely exploitable without logging in
  • On your watchlist: windows server

References

Original description

Integer underflow (wrap or wraparound) in Windows Failover Cluster allows an unauthorized attacker to deny service over a network.

Last activity 13 Oct 2026. Patch Forecast updates every hour.