SonicWall Email Security Path Traversal Vulnerability

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

Technical Severity

CVSS v3.1 Metrics

MEDIUM

4.9 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

42.68 %

Predictive Probability

Percentile Rank

97.4 th

Documented as more likely to be exploited than 97.4% of known CVEs.

Detection Date

Nov 03, 2021

Remediation Due

Nov 17, 2021

CISA Catalog Active

Threat Analysis

SonicWall Email Security contains a path traversal vulnerability that allows a post-authenticated attacker to read files on the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20022 to achieve privilege escalation.

Remediation Directive

Apply updates per vendor instructions.

Asset Context

Vendor Identity

SonicWall

Affected Product

SonicWall Email Security

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-22

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2021-20023