CyberSec.Space Logo
Back to CVE Browser

CVE-2021-20023

🔥 Known Exploited (CISA KEV)MEDIUM
4.9
CVSS Severity Score
EPSS Score43.8710%
EPSS Percentile86.97th
Published2021-04-20
Last Modified2025-11-12
Data SourcesNVDCISA KEVFIRST.org EPSS

Vulnerability Description

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.

Affected Platforms (CPE)

📦
Sonicwall

Email Security

< 10.0.9.6173
💻
Sonicwall

Email Security Appliance 9000 Firmware

< 10.0.9.6177
💻
Sonicwall

Email Security Appliance 3300 Firmware

< 10.0.9.6177
💻
Sonicwall

Email Security Appliance 4300 Firmware

< 10.0.9.6177

References & Advisories

🔗 https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0010
🔗 https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0010
🔗 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20023

Related Security Intelligence Articles

Daily Global Cyber Threat Intelligence Digest — July 23, 2026

Key threat updates including CISA's KEV addition of Langflow CVE-2026-0770 remote code execution, unauthenticated path traversal in Windmill CVE-2026-29059, and ongoing incident response guidance for SonicWall SMA1000 zero-day exposures.

2026-07-23

Daily Global Cyber Threat Intelligence Digest — July 20, 2026

Technical analysis of zero-day exploit chains against SonicWall SMA1000 appliances (UTA0533), NGINX regular expression heap corruption vulnerabilities (CVE-2026-42533), and Sandworm's (UAC-0145) ClickFix fake CAPTCHA campaigns.

2026-07-20

Related Vulnerabilities

CVE-2026-132687.8

G DATA Total Security Backup Service Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local atta...

CVE-2026-83389.2

A Spring Security authentication and authorization bypass exists in Coverity Connect versions between 2023.6.0 and 2026.3.0. An un...

CVE-2026-546938.2

ZITADEL is an open source identity management platform. From 2.43.0 through 2.71.19, from 3.0.0 until 3.4.11, and from 4.0.0 until...

CVE-2026-203165.3

A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, rem...