Name: CVE-2021-20027: Buffer Copy without Checking Size of Input
Creator: Rapid7
Published: 2021-06-14T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-20027, CWE-120, CVSS 7.5, EPSS 0.00432

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.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Sonicwall Sonicos	—	Update SonicWall SonicOS Gen6 NSsp12K/SM9800 to version 6.5.1.12-3n or laterUpdate SonicWall SonicOS Gen6 NSv Virtual to version 6.5.4.v_21s-1288 or laterUpdate SonicWall SonicOS Gen6 to version 6.5.4.8-89n or laterUpdate SonicWall SonicOS Gen7 NSv to version 7.0.1-R1282 or laterUpdate SonicWall SonicOS Gen7 TZ/NSa to version 7.0.1-R1456 or laterUpdate SonicWall SonicOS Gen7 NSsp to version 7.0.1-R579 or laterUpdate SonicWall SonicOS Gen5 SOHO to the latest version	May 25, 2026	Jun 13, 2021

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CVSS Details

Covered by Rapid7

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