Description
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls.
Affected products
sonicwall: sonicos; sonicwall: nsa 2650; sonicwall: nsa 2700; sonicwall: nsa 3650; sonicwall: nsa 3700; sonicwall: nsa 4650; sonicwall: nsa 4700; sonicwall: nsa 5650; sonicwall: nsa 6650; sonicwall: nsa 6700; sonicwall: nsa 9250; sonicwall: nsa 9450; sonicwall: nsa 9650; sonicwall: tz270; sonicwall: tz270w
References2
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016 MitigationVendor Advisory
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016 MitigationVendor Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 71 · as of 11 November 2026
- CWE
- CWE-120
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.