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

8.8 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Exploitation Likelihood

EPSS Prediction

93.80 %

Predictive Probability

Percentile Rank

99.9 th

Documented as more likely to be exploited than 99.9% of known CVEs.

Detection Date

Jan 10, 2023

Remediation Due

Jan 31, 2023

CISA Catalog Active

Threat Analysis

Microsoft Exchange Server contains an unspecified vulnerability that allows for privilege escalation. This vulnerability is chainable with CVE-2022-41082, which allows for remote code execution.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-41080

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2022-41080