# SonicWall VPN Client DoS Flaw Patched

Published: 2026-08-10 · Severity: routine
Canonical: https://vorant.io/reports/c290ac96-1599-5d73-b5db-1ee50c6e5bc6/sonicwall-vpn-client-dos-flaw-patched

> A denial-of-service vulnerability in SonicWall Global VPN Client versions before 5.0.0.2008 was disclosed with a vendor patch available.

ANSSI-FR issued an advisory regarding a vulnerability in SonicWall's Global VPN Client affecting versions prior to 5.0.0.2008. The flaw, tracked as CVE-2026-66151, allows an attacker to trigger a denial-of-service condition on affected systems.

SonicWall published a corresponding security bulletin (SNWLID-2026-0010) on August 6, 2026, alongside patches. Organizations using the affected client versions should apply the vendor-provided fixes to mitigate the risk. There is no indication in the advisory of active exploitation in the wild.

## Mentioned in this report

- Vulnerabilities: CVE-2026-66151

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0990

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