CVE-2021-31207

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

Microsoft Exchange Server Security Feature Bypass Vulnerability

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31207

https://www.zerodayinitiative.com/advisories/ZDI-21-819/

http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html

Details

Source: MITRE

Published: 2021-05-11

Updated: 2021-09-21

Risk Information

CVSS v2

Base Score: 6.5

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

Impact Score: 6.4

Exploitability Score: 8

Severity: MEDIUM

CVSS v3

Base Score: 7.2

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

Impact Score: 5.9

Exploitability Score: 1.2

Severity: HIGH

Tenable Plugins

View all (1 total)

IDNameProductFamilySeverity
149393Security Updates for Exchange (May 2021)NessusWindows : Microsoft Bulletins
high