by Kastro
Paper/Archive/CVE-2026-56164

CVE-2026-56164

Microsoft Microsoft SharePoint Enterprise Server 2016 — Microsoft SharePoint Server Elevation of Privilege Vulnerability

KEV · due 17 JulEPSS 1%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
92
CVSS 9.8 (NVD)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 63.2.632 × 2012.6Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.

Affected

ProductAffectedFixed inSource
Microsoft SharePoint Enterprise Server 201616.0.0 – < 16.0.5561.100116.0.5561.1001CNA
Microsoft SharePoint Server 201916.0.0 – < 16.0.10417.2017516.0.10417.20175CNA
Microsoft SharePoint Server Subscription Edition16.0.0 – < 16.0.19725.2043416.0.19725.20434CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
microsoft (CNA)5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:F/RL:O/RC:C
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: partial

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-56164refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56164kevcisa.gov/known-exploited-vulnerabilities-catalog