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CRITICAL SEVERITY
CVE-2020-5135 SonicWall · SonicOS

SonicWall SonicOS Buffer Overflow Vulnerability

Technical Severity

CVSS v3.1 Metrics

CRITICAL
9.8 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Likelihood

EPSS Prediction

23.78 %
Predictive Probability
Percentile Rank
95.9 th

Documented as more likely to be exploited than 95.9% of known CVEs.

Detection Date

Mar 15, 2022

Remediation Due

Apr 05, 2022

CISA Catalog Active

Threat Analysis

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence