CVE-2025-40596: sonicwall sma 100 series Stack-based Buffer Overflow

Vulnerability summary

CVE-2025-40596 is a high (CVSS 7.3) Stack-based Buffer Overflow vulnerability in sonicwall sma 100 series. EPSS estimates a 57.35% chance of exploitation in the next 30 days, higher than 99% of scored vulnerabilities.

Timeline

1. 23-07-2025
   PublishedVulnerability first disclosed.
2. 26-02-2026
   Last modifiedVulnerability information updated.

Description

A Stack-based buffer overflow vulnerability in the SMA100 series web interface allows remote, unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).