CVE-2026-10858 IBM MQ for HPE NonStop - Buffer Overflow

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 contains a buffer underflow caused by improper processing of multi-segment messages, letting authenticated attackers cause denial of service or execute arbitrary code.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.37% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to a version later than 8.1.0.40 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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