CVE-2021-20023CISA KEVEPSS p98.9%

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

CVSS 4.9 ()
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
EPSS51.41% probability of exploitation · percentile 98.9% · 2026-10-05T12:00:23Z
Last modified2026-10-01

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

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

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.