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Vulnerability record · CVE-2026-3469 · published 31 March 2026

CVE-2026-3469: Sonicwall email security improper input validation vulnerability

Sonicwall · Email Security

A denial-of-service (DoS) vulnerability exists due to improper input validation in the SonicWall Email Security appliance, allowing a remote authenticated attacker as admin user to cause the application to become unresponsive.

2.7 CVSS 3.1 Low EPSS 0.47% · top 61.4% CWE-20 · Improper input validation
2.7CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
24 Jul 2026Last modified by NVD

Description

A denial-of-service (DoS) vulnerability exists due to improper input validation in the SonicWall Email Security appliance, allowing a remote authenticated attacker as admin user to cause the application to become unresponsive.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0002 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2021-44228Apache Log4j2 JNDI lookup remote code executionApache Log4j2 versions 2.0-beta9 through 2.15.0 (excluding 2.12.2, 2.12.3, and 2.3.1) do not protect against attacker-controlled LDAP and other JNDI …KEVEPSS 100%analysed9.8CVE-2021-20021SonicWall Email Security improper privilege management allows admin account creationSonicWall Email Security 10.0.9.x contains an improper privilege management flaw that lets an attacker create an administrative account by sending a …KEVEPSS 89%analysed9.0CVE-2021-45046Apache Log4j 2.15.0 Incomplete Fix Allows JNDI Lookup InjectionThe fix for CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. When a non-default Pattern Layout uses a Cont…KEVEPSS 100%analysed7.2CVE-2021-20022SonicWall Email Security post-auth unrestricted file uploadSonicWall Email Security 10.0.9.x allows an authenticated attacker to upload an arbitrary file to the remote host (CWE-434). Because the upload is un…KEVEPSS 17%analysed4.9CVE-2021-20023SonicWall Email Security path traversal allows authenticated file readSonicWall Email Security 10.0.9.x contains a path traversal flaw (CWE-22) that lets an authenticated attacker read arbitrary files on the remote host…KEVEPSS 52%analysed7.4CVE-2021-3450Openssl improper certificate validation vulnerabilityThe X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Sta…EPSS 18%5.9CVE-2021-45105Apache Log4j2 uncontrolled recursion in self-referential lookups causes DoSApache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) fail to protect against uncontrolled recursion from self-referential lo…EPSS 100%analysed5.3CVE-2023-0655Sonicwall email security error message information leak vulnerabilitySonicWall Email Security contains a vulnerability that could permit a remote unauthenticated attacker access to an error page that includes sensitive…EPSS 0.72%

Source: NIST National Vulnerability Database (record CVE-2026-3469), CISA KEV, FIRST EPSS (scores of 2026-10-09). This page is refreshed as NVD updates the record.