CVE-2026-50522 KEV
9.8
CRITICAL · CVSS 3.1 · EPSS 3% (pctl 87)
Patch first
On CISA KEV — known exploited in the wild, due 2026-07-25.
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.04% — more likely to be exploited than 87% of all CVEs |
| Weakness | CWE-502 |
| On CISA KEV | yes — remediate by 2026-07-25 |
| Public exploit | none known |
| Published | 2026-07-14 |
| Last modified | 2026-07-23 |
CISA KEV
| Name | Microsoft SharePoint Deserialization of Untrusted Data Vulnerability |
|---|---|
| Added | 2026-07-22 |
| Due | 2026-07-25 |
| Vendor / product | Microsoft / SharePoint |
| Ransomware use | none reported |
Affected (1)
| Vendor | Product |
|---|---|
| microsoft | sharepoint server |
References
→ the Explorer · watch your stack · NVD