CVE-2019-1257

high

Description

A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka 'Microsoft SharePoint Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-1295, CVE-2019-1296.

References

https://www.vulncheck.com/blog/cve-2026-63520-sharepoint-unsafe-type-rce

https://www.tenable.com/blog/microsofts-september-2019-patch-tuesday-tenable-roundup

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1257

https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-9823

Details

Source: Mitre, NVD

Published: 2019-09-11

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.11659