HIGH

CVE-2026-72989

CVSS v3

7.5

HIGH

EPSS Score

1.0 %

exploit probability, as of 2026-09-25

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Use of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Published: 2026-09-08
Last Modified: 2026-09-21

Frequently asked questions

What is CVE-2026-72989?

Use of uninitialized resource in Windows Failover Cluster allows an unauthorized attacker to disclose information over a network.

Is CVE-2026-72989 actively exploited?

Active exploitation of CVE-2026-72989 has not been confirmed. Its EPSS score was 1.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-72989?

CVE-2026-72989 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C.

Is CVE-2026-72989 affecting your environment?

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