Critical CVSS 8.1 EPSS 0.0327 2021-03 archive

Executive Summary

None

Overview

8.1
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Remote Code Execution
Released Mar 9 2021
Last Updated Mar 9 2021
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.0327 — 0.87106 percentile
NVD CVSS 8.1 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.3

EPSS Score

0.0327
probability of exploitation in the next 30 days
0.87106 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

5 affected products
Product KB Article Severity Impact Restart Required
.NET 5.0 Release Notes (Security Update) Critical Remote Code Execution Maybe
.NET Core 2.1 Release Notes (Security Update) Critical Remote Code Execution Maybe
.NET Core 3.1 Release Notes (Security Update) Critical Remote Code Execution Maybe
Mono 6.12.0 Release Notes (Security Update) Critical Remote Code Execution Maybe
Visual Studio 2019 for Mac Release Notes (Security Update) Critical Remote Code Execution Maybe

Patches

1 patch
Article Type Restart
Release Notes Security Update Maybe

Known Exploits

Acknowledgments

None