CVE-2020-5135
SonicWall SonicOS Buffer Overflow Vulnerability
Summary
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.
Affected software
Vendor: SonicWall · Product: SonicOS
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in SonicWall
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2021-20038 | SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability | 99.9% | Yes |
| CVE-2019-7481 | SonicWall SMA100 SQL Injection Vulnerability | 99.9% | Yes |
| CVE-2024-53704 | SonicWall SonicOS SSLVPN Improper Authentication Vulnerability | 95.3% | Yes |
| CVE-2021-20021 | SonicWall Email Security Improper Privilege Management Vulnerability | 88.8% | Yes |
| CVE-2023-44221 | SonicWall SMA100 Appliances OS Command Injection Vulnerability | 76.3% | Yes |
| CVE-2021-20023 | SonicWall Email Security Path Traversal Vulnerability | 51.7% | Yes |
| CVE-2021-20016 | SonicWall SSLVPN SMA100 SQL Injection Vulnerability | 40.0% | Yes |
| CVE-2021-20028 | SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability | 30.1% | Yes |
Is your domain exposed?
Run a free, instant security report for any domain — exposure score, email auth, TLS and breach metadata.
Get your free reportSources: CISA KEV catalog · NVD · FIRST EPSS
This product uses the NVD API but is not endorsed or certified by the NVD.
All information is aggregated from public sources for awareness only and does not constitute an accusation or a security assessment. No personal data or credentials are published.