CVE-2026-10858 — CRITICAL (9.9)

Vulnerability Description

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.

CVSS Score

9.9

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-122

References

https://www.ibm.com/support/pages/node/7287704

FAQ

What is CVE-2026-10858?

CVE-2026-10858 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 mu...

How severe is CVE-2026-10858?

CVE-2026-10858 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-10858?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.