CVE-2026-10858
CVSS v3
9.9
CRITICAL
EPSS Score
0.4 %
exploit probability, as of 2026-09-28
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2026-09-18
- Last Modified
- 2026-09-19
Frequently asked questions
What is CVE-2026-10858?
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.
Is CVE-2026-10858 actively exploited?
Active exploitation of CVE-2026-10858 has not been confirmed. Its EPSS score was 0.4% on 2026-09-28, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-10858?
CVE-2026-10858 has a CVSS v3 base score of 9.9 (CRITICAL severity).
Is CVE-2026-10858 affecting your environment?
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