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SonicWall SonicOS Vulnerability Allows Remote DoS Attacks

SonicWall SonicOS Vulnerability Allows Remote DoS Attacks

First seen 20 Nov 2025, 20:18 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

SonicWall has issued a security advisory regarding a critical vulnerability in its SonicOS operating system, identified as CVE-2025-40601. This high-severity flaw affects Gen7 and Gen8 hardware and virtual appliances, allowing remote, unauthenticated attackers to exploit a stack-based buffer overflow in the SSLVPN service, resulting in a denial of service (DoS) condition.

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