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Vulnerability record · CVE-2023-0656 · published 2 March 2023

CVE-2023-0656: Sonicwall sonicos stack-based buffer overflow vulnerability

Sonicwall · Sonicos

A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

7.5 CVSS 3.1 High EPSS 41% · top 1.4% CWE-121 · Stack-based buffer overflowCWE-787 · Out-of-bounds write
7.5CVSS 3.1 base score
41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0004 Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0004 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-0656), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.