AUGUST 4, 2026
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Case File

CVE-2021-20048

HIGH · CVSS 8.8 EPSS 1.94% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-01-10 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-20048
Severity
HIGH
CVSS
8.8
EPSS
1.94%

Original NVD 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.