by Kastro
Paper/Archive/CVE-2026-50522

CVE-2026-50522

Microsoft Microsoft SharePoint Enterprise Server 2016 — Microsoft SharePoint Remote Code Execution Vulnerability

KEV · due 25 JulEPSS 3%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
97
CVSS 9.8 (CNA)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 87.5.875 × 2017.5Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code 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

microsoft (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-50522kevcisa.gov/known-exploited-vulnerabilities-catalog