Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U H H H 9.8 .2687 98.0 YES
AFFECTED Product Versions Fixed SonicOS SonicOS 6.5.4.7-79n and earlier – —
TIMELINE Dec 31 Reserved by sonicwall Oct 12 Published (CNA: sonicwall) Mar 15 Added to CISA KEV, remediation due 2022-04-05
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.
| Date | Event | Detail |
|---|---|---|
| December 31, 2019 | Reserved | Reserved by sonicwall |
| October 12, 2020 | Published | Published (CNA: sonicwall) |
| March 15, 2022 | KEV ADDED | Added to CISA KEV, remediation due 2022-04-05 |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| SonicWall | SonicOS | — | SonicOS 6.5.4.7-79n and earlier | — |
Authoritative record: CVE-2020-5135 at cve.org
Vendors: sonicwall
Weaknesses: CWE-120
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-5135 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
