Microsoft Exchange Server Privilege Escalation Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

HIGH

7.4 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

91.50 %

Predictive Probability

Percentile Rank

99.7 th

Documented as more likely to be exploited than 99.7% of known CVEs.

Detection Date

Mar 03, 2022

Remediation Due

Mar 17, 2022

CISA Catalog Active

Threat Analysis

A privilege escalation vulnerability exists in Microsoft Exchange Server. An attacker who successfully exploited this vulnerability could attempt to impersonate any other user of the Exchange server.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2018-8581