# CVE-2020-5135

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. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.

- Page: https://www.vulneraibility.com/cve/CVE-2020-5135
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2022-03-15; CISA due date 2022-04-05; known ransomware use
- EPSS: 26.87% (percentile 98.1)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-06)
- Weakness: CWE-120
- Published: 2020-10-12

## Affected versions

- SonicWall SonicOS: affected SonicOS 6.5.4.7-79n and earlier; SonicOS 6.5.1.11-4n and earlier; SonicOS 6.0.5.3-93o and earlier; SonicOSv 6.5.4.4-44v-21-794 and earlier; SonicOS 7.0.0.0-1

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0010
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-5135

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.