VULNERABILITY INTELLIGENCE

CVE-2021-20048

CVSS score8.8 HIGH
EPSS probability2.00%
CISA KEVNot currently listed
Published2022-01-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

A Stack-based buffer overflow in the SonicOS SessionID HTTP response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.

Weakness classification

  • PSIRT@sonicwall.com: CWE-121
  • nvd@nist.gov: CWE-787

Primary references