EUVD-2026-17642Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
Primary rating from Vendor (sonicwall) · only source for this CVE.
CVSS VectorVendor: sonicwall
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
SonicWall Email Security appliance becomes unresponsive due to improper input validation when an authenticated administrator submits malformed input, causing a denial of service. The vulnerability affects all versions of SonicWall Email Security and requires valid admin credentials to exploit. While CVSS scoring is unavailable, the attack vector is remote and authenticated, limiting exposure to insider threats or compromised admin accounts.
Technical ContextAI
SonicWall Email Security is a gateway-based email filtering and security appliance that processes incoming and outgoing email traffic. The vulnerability stems from inadequate input validation (CWE-20: Improper Input Validation) in the application's request handling logic. An authenticated administrator can craft malicious input that bypasses validation controls, causing the application process to hang or crash and rendering the entire email security service unavailable. The issue affects the core application layer rather than a specific email protocol implementation.
RemediationAI
Consult the official SonicWall advisory at https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0002 for the specific patched version applicable to your SonicWall Email Security deployment. Once a patch is released, apply it according to the vendor's update procedures. As an interim mitigation, restrict administrative console access to trusted networks and monitor admin accounts for unusual activity; consider implementing multi-factor authentication (MFA) for admin login if not already enabled. Audit existing admin accounts to ensure only authorized personnel retain access.
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Same weakness CWE-20 – Improper Input Validation
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External POC / Exploit Code
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