What is CVE-2026-122987?

CVE-2026-122987 is a medium-severity vulnerability in Microsoft Hpc Pack 2016, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-11-10.

How severe is CVE-2026-122987?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Microsoft Hpc Pack 2016

CVE-2026-122987

Missing authentication for critical function in Microsoft High Performance Computing (HPC) Pack allows an unauthorized attacker to elevate privileges over a network.

Vulnerability class: Broken Authentication

Published 2026-11-10 · last modified 2026-11-10.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122987 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-122987?: CVE-2026-122987 is a medium-severity vulnerability in Microsoft Hpc Pack 2016, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-11-10.
How severe is CVE-2026-122987?: Medium severity. CVSS v3 base score is 5.9 out of 10.