CVE-2021-20023CISA KEVEPSS p98.8%

CVE-2021-20023SonicWall Email Security Path Traversal Vulnerability

SonicWall / SonicWall Email Security

Description

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.

Scoring

EPSS51.41% probability of exploitation · percentile 98.8% · 2026-06-18T12:00:27Z

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntrySonicWall Email Security Path Traversal Vulnerabilitykev-cve-2021-200230%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
SonicWall Email Security Unrestricted Upload of File Vulnerability
CVE
SonicWall Email Security Improper Privilege Management Vulnerability
CVE
SolarWinds Serv-U Path Traversal Vulnerability
CVE
CVE-2025-40604
CVE
SonicWall SonicOS Improper Access Control Vulnerability
CVE
Cisco SD-WAN Path Traversal Vulnerability
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.