CVE-2021-20022CISA KEVEPSS p96.9%

CVE-2021-20022SonicWall Email Security Unrestricted Upload of File Vulnerability

SonicWall / SonicWall Email Security

Description

SonicWall Email Security contains an unrestricted upload of file with dangerous type vulnerability that allows a post-authenticated attacker to upload a file to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20023 to achieve privilege escalation.

Scoring

CVSS 7.2 ()
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS16.51% probability of exploitation · percentile 96.9% · 2026-10-05T12:00:23Z
Last modified2026-10-01

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntrySonicWall Email Security Unrestricted Upload of File Vulnerabilitykev-cve-2021-200220%live

Related by meaning· 6

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

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