CVE-2026-10858

Critical CVSS 9.9

Published 2026-09-18 · last changed 2026-09-19

The fix

We hold no Microsoft remediation data for CVE-2026-10858, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer underflow when processing multi-segment messages.

Sources

NVD record for CVE-2026-10858

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H