Important EPSS 0.09554 2019-05 archive

Executive Summary

A remote code execution vulnerability exists in Microsoft SharePoint Server when it fails to properly identify and filter unsafe ASP.Net web controls. An authenticated attacker who successfully exploited the vulnerability could use a specially crafted page to perform actions in the security context of the SharePoint application pool process. To exploit the vulnerability, an authenticated user must create and invoke a specially crafted page on an affected version of Microsoft SharePoint Server. The security update addresses the vulnerability by correcting how Microsoft SharePoint Server handles processing of created content.

Overview

Important
MS Severity
Not Exploited
MS Exploit Status
N/A
MS Exploit Likelihood
Category Remote Code Execution
Released May 14 2019
Last Updated May 14 2019
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.09554 — 0.94842 percentile

EPSS Score

0.09554
probability of exploitation in the next 30 days
0.94842 percentile - updated 2026-06-20
View on FIRST.org

Affected Products

2 affected products
Product KB Article Severity Impact Restart Required
Microsoft SharePoint Enterprise Server 2016 4464549 (Security Update) Important Remote Code Execution Maybe
Microsoft SharePoint Foundation 2013 Service Pack 1 4464564 (Security Update) Important Remote Code Execution Maybe

Patches

2 patches
Article Type Restart
4464549 Security Update Maybe
4464564 Security Update Maybe

Known Exploits

Acknowledgments